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F600 Precision AC Thermometry Bridge

1. Measurement Units Conversion Under Over Range Units PRT Range Resistance None 0 5 000 ohms Din90 201 851 C RREK Temperature CvD 201 850 C F K ITS90 201 963 cC IE IS Page 77 O ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL This page is intentionally left blank Page 78 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 7 Calibrating the F600 7 1 F600AC Instrument calibration The F600AC bridge measurement technique used in the F600 is inherently very stable and linear However a small drift of the internal reference resistor may occur with time making periodic re calibration advisable Check calibration daily before and after use with known regularly calibrated reference resistors 7 2 Equipment Temperature controlled environment at 20 C 2 C Set of stable calibrated 0 01pprm resistors 3 resistors 7 3 Calibration procedure See section 5 3 9 Page 79 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL This page is intentionally left blank Page 80 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 8 Obtaining the best from the F600AC bridge 8 1 Procedure Please observe the following to obtain the best results from your instrument v Do ensure there are no draughts or forced air flow around the instrument e g from an air conditioning unit v Allow at least 20 minutes for the instrument to fully stabilise if switching on
2. 47 MISTER 10 31 e E 10 39 G Getting started 6 I IEEE interface 84 85 Input connections 12 Installation information X Internal resistor calibration ITS 90 5 niensis 123 124 125 K Keypad estere 8 L EDS HP 8 POWER iti ber T ER 8 tele E 8 M Mains input 13 Maintenance 118 Measurement principles 2 Measurement ranges 77 O ASL 2008 ASL Menu Keys eese 49 BOCK PS 11 Met z e20sgtee isusrgecmsgiesge 11 Navigation 11 N Name plate 13 Numeric keys soccer 11 O Operating modes 20 Alternative display 21 Graphical 22 NOM iiit 20 Standaby sess 23 OPTIONS scr ta 113 P Password aiaiai 49 PC command syntax 87 PC commands 83 RISIKEN 89 CH 105 prc cata 105 RS IRS E gheet e 112 yc 112 RT D WE 108 1r cad nicamauiess 110 TA eo bct dti bas 106 CHANNEL eee 95 CHANnel es 96 CONFigure AO T citri itn 92 AO T nosenom 93 CURRent eren 90 CURRENT n 90 IESSE asit rent 9 FILTET rere 92 GAIN s ismes 90 GAIN reren 91 REFerence crcr 93 REFerence 93 F600AC 14 001 2 8 ASL MEAS READALL orre 98 MEASURE FETCH iussit ists 97 READ cacao cun 96 MCHDE iones 93 MODE icis 94 Oe GEN 94 MSET scisco a 95 PB e etd eise 104 CEN nn 104 m EIS 102 QNT inti nte tena 102 RE 98 Dress 99 NM 100 NM scenic 100 I
3. 4 Once the current ratio cannot be improved press the right key to select the digit one decade to the right 10 times more sensitive and repeat the process until a change in the least significant digit does not improve the balance result An example is shown below for of a manual balance sequence starting from somewhere near balance The balance sequence is shown taking place from right to left Increase the gain by a factor of ten to increase the meter sensitivity Increase the gain by a factor of ten to increase the meter sensitivity Increase the gain by a factor of ten to increase the meter sensitivity The bridge has been optimally balanced since no improvement can be made in the least significant digit An alternative strategy can be adopted If you know the R value approximately calculate the ratio Ry Rs and use this as a starting point from which to balance the bridge 15 Initially select the minimum gain If balancing from an unknown starting point Page 29 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 1 4 Zero balance mode The F600AC bridge has an internal zero check facility This mode is useful to confirm that the bridge is operating correctly In this mode the common point of the inductive divider is disconnected from R and connected to R R common point Setting the divider ratio to zero in all decades should give a balanced result of 0 000000 Any errors due to standing currents pick up
4. Shift key Function Alternates numerical graphical standby display Opens and closes the R R channel select menu Opens and closes the display zero null menu Starts and stops display measurement continues Opens and closes the sensor current menu Opens and closes the instrument gain menu Opens and closes measurement bandwidth menu Opens and closes the display units menu Selects lower function keys and Exp Instrument functions shift keys Description Select function menu Select Probe menu Zero check Unity check Set current Set Auto Manual balance Select Reference resistor Shift Function Selects function menu Opens and closes probe menu Selects zero check Selects unity check Sets root 2 current Selects auto or manual balance mode Opens the reference resistor menu ASL 2009 ASL F600AC 14 001 2 9 ASL F600AC User Manual Key symbol Description Clear data entry return Menu selection Save entry Key symbol Description Numerical data entry Minus key Decimal point Menu function keys Clears any data entry errors or returns from a menu Used to navigate through the menus Saves data entry and returns to previous menu Numeric keypad Function Used during numerical data entry Used during numerical data entry Function Displays other sub menus Enters a numerical digit or selects a numeric menu Numeric shift keys Key symb
5. the name of your company e This will create a shortcut icon on the desktop called ASL Downloader Click on the ASL downloader icon to run the downloader program Select the F600 Instrument option e Click on the Help button Firmware Downloader k x FIRMWARE DOWNLOADER Firmware File r Firmware Downloader Select Instrument Select C F200 F600 Firmware Version Status Ready Progress E ASL ms el zs e Read the instructions and follow the instructions provided to update the instrument s firmware 33 The same download program can be used to update F200 firmware Page 122 ASL 2008 F600AC 14 001 2 8 ASL F600AC User Manual 15 Appendix 2 Callendar van Dusen 15 1 Callendar van Dusen equation CvD Platinum Resistance Thermometers PRTs are one of the most linear temperature sensors that we have Even so the relationship between resistance and temperature is not entirely linear and so it is necessary for the conversion from resistance to temperature to allow for this The IEC751 standard provides an equation that can be used to convert resistance to temperature taking into account the small non linearities of the PRT R R ie Art Br c r 100 Where R is the resistance at temperature t and Ro is the resistance at 0 C The coefficients A B and C C 0 if 2 O C are defined in IEC751 for standard PRTs However the c
6. from R R x This technique achieves immunity from slow moving time and temperature drifts in the electronics as it is not affected by voltage measurement gain variations or current source fluctuations In addition the AC Bridge technique used achieves superior stability performance over DC Bridges by eliminating all other sources of thermally generated EMF s voltages and sources of drift see appendix 5 for a brief description of AC bridge operation The reference resistor may be either one of the internal resistors fitted as standard or a reference resistor connected to the external Rs ports Either way the resistor must have a known calibrated value for an accurate determination of the fhermometer resistance R Page 2 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual When using PRTs the relationship between resistance and temperature varies slightly from one PRT to another Therefore no matter how accurately the F600 measures the PRT resistance if the relationship between resistance and temperature for a particular PRT is not known accurate temperature measurement is not possible The F600 uses PRT calibration data to overcome this problem and calculates the temperature from conversion functions using calibration data stored in the F600 s internal non volatile memory This method enables the F600 to convert ratio to temperature uniquely for each sensor used Applications requiring multiple thermometers ma
7. 101 WI stetit 101 SYSTem ele ssi as 89 Page 129 REMote 89 UNIT TEMPerature 97 TEMPerature 98 E 74 Probe edit menu 53 Probe review menu 51 Probe safety information xi R Rating plate 13 Rear panel erreren 13 Remote mode 86 Reset factory defaults 69 Resistors 2 terminal resistors 18 4 terminal resistors 17 Rs definition voc 2 Rt definition 2 85232 iesus um escondida 83 S Safety information viii O ASL 2009 F600AC User Manual Serial number 13 le 120 SENNO UP MENS 5 Specifications 115 Statistics men 50 Steinhart amp Hart 127 System information 62 System MENU crcrcrcre 62 T Technical support 120 U Unpacking eee 5 USB cascos 14 83 y VED display ese 8 W WAMAN Y scn 120 F600AC 14 001 2 9
8. Press the 2 key on the numeric pad or use the up and down keys to navigate to the Probe Menu and press the OK key to access this menu 2 Probes 1 Review 2 Edit A OK v Menu Back LI LJ Use the Prev and Next soft keys to move between pages to review information about all the current probes Move to any probe other than Prb00 22 Probe Probe 01 Name def01 Wire 4 Wire Conv DIN RO 100 A 3 9083001000e 03 B 5 775000000e 07 C 4 183000000e 12 Prev II Edit Delete E Next Menu Back LILILJLI Ly LI Page 53 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Note Probe 00 is the default F600 probe You will not be able to edit details for this probe Press the Next soft key to view the next probe s details The display will change to 22 Probe Probe 01 kkkkk empty kkk Menu Back LJ LJ LJ LJ LJ The New soft key will appear The New soft key will enter a new probe with the first unassigned number The display will change to show a new probe with the default system probe settings If at any time you want to exit the procedure press the Menu or Back key but note that the entries will not be saved 22 Probe Edit _ __ New probe shown as unsaved Probe 01 Unsaved Name pb01 4 Wire DIN 100 3 908300010e 03 5 7750000000e 07 4 1830000000e 12 Save Cancel oOo L3 CH Press the Save soft key to get to the following screen Page 54 ASL 2009 F6
9. Use the navigation key to move to the Presets menu as shown below 4 System 1 Information 2 Display 3 Clock 4 Calibration 5 Analogue 1 OK 6 Presets Menu Back Press the 6 key or the OK key to see the current values 46 Instrument Baud Rate 9600 IEEE address 06 Menu Back 22 The default is 9600 baud Page 74 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Press the Edit soft key to alter the value The screen will change to show 46 Instrument Current edit field Baud Rate 9600 TA v Menu Back LJ LI Editing is similar to the previous menus Use the A and Y navigation keys to move the active edit field Move to the field that you want to change and press the and BR keys to alter the values within the field The numeric keypad is used to enter the IEEE adaress Once you are happy with the entry press the Menu key to return to measurement mode or press the Back key to return to the previous menu Page 75 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL This page is intentionally left blank Page 76 ASL 2009 F600AC 14 001 2 9 ASL 6 Instrument Measurement Range 6 1 Instrument measurement working range F600AC User Manual The instrument can detect the following conditions Open Circuit Probe Over Range measurement and Under Range measurement These conditions are shown by a message on the display 6 2 Measurement ranges
10. 8 ASL F600AC User Manual 18 Appendix 5 AC Bridge operation 18 1 AC Bridge basics Although the principle of measuring the ratio of two resistors see introduction is identical between AC and DC bridges the bridges operate very differently in the way they perform this ratio measurement DC bridges require very stable and accurate electronics to achieve their performance AC bridges do not require such high stability Since they are based on an AC measurement these bridges are also immune to all thermal problems associated with DC bridges The basic bridge arrangement is shown below az Balancing circuit Inductive divider AC constant current source Phase difference detector Display Switches Ratio 1 000450 The AC constant current source generates a 25Hz sine wave that supplies Rr and Rs in series so both resistors see identical currents 5 The inductive divider consists of numerous turns of wires round transformer cores The turns are arranged so that they form a series of ratio dividers that can be individually switched in and out by the balancing circuit The bridge works by balancing the inductive dividers using the phase difference detector so that the ratio of currents in the two series resistors is precisely known and equal to their ratio Since the balance point depends only on the ratio of the transformer turns to the unknown resistance the measurement is precise and unaffecte
11. ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 3 8 Display menu This menu is used to set the desired display brightness level Press the 4 key on the numeric pad and use the up and down keys to navigate to the System Menu and press the OK key to access this menu Use the navigation key to move to the Display menu as shown below 4 System Information Gg n E Calibration Analogue 1 OK Presets Menu Back Press the 2 key or the OK key to get to this screen 42 Brightness Level 80 Change Up Down Keys Exit Press Menu again v Menu Back LJ LI Use the A and W navigation keys to set the brightness to the desired value Press the Menu key to accept the value and return to measurement mode or the Back key to return to the previous menu Page 63 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 3 9 Clock menu This menu is used to set the current date and time Press the 4 key on the numeric pad and use the up and down keys to navigate to the System Menu and press the OK key to access this menu Use the navigation key to move to the Clock menu as shown below 4 System 1 Information 2 Display 3 Clock 4 Calibration 5 Analogue 1 OK 6 Presets v Menu Back Press the 3 key or the OK key to set the time and or date 43 Set Time Time hh mm ss 17 43 40 Date dd mm yy 24 03 07 OK Refresh Change l Menu Back LJ LJ LI CI The Refresh sof
12. E n nnnnnnE ee Returns None Function Sets the value of the externally select channels reference resistor The channel selected MUST BE of type Rs Example CH RS E 1 001000E 02 lt cr gt command Errors E00 Unrecognised command E01 Command is not part of CH series E02 Channel select is not of Type RS see CH TY command E03 Missing n nnnnnE ee parameter EOA n nnnnnE ee exceeds limits 0 1 or gt 1E 8 9 4 47 CH RS In Command CH RS In Returns nnnnnnnnE ee lt cr gt Function Returns the internal resistor s calibration value see table below F600 25R value 100R value Example CH RS 11 lt cr gt command 99 99987 lt cr gt lt lf gt response Errors EO0 Unrecognised command E01 Command is not part of CH series or n exceeds value for unit Page 112 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 10 Options and Accessories 10 1 Accessories The following options are available for the F600 FA 1 FA 2 FA 3 FA 4 T25 650 1 T100 650 1 T25 660 1 T100 450 2 T100 450 3 T100 600 TO 25 962 1 SB148 FRA RW RR RTE Page 113 Part Number Description 1 pair coaxial leads BNC to BNC 3 metres long 1 pair coaxial leads BNC to open end 3 metres long adaptor box BNC to terminal and BNC 2 Terminal Binding Post to BNC 2 off Standard reference PRT Ro 25 5 ohms nominal 2 metre cable 4 wire plus screen with spade terminal connections
13. F600AC User Manual lt lt Default for F600 lt lt CR required i e xOD lt lt rqs also lt lt line added unless you specify the lt lt number of byte top read it requests lt lt Actual flags lt lt CR appears as a dot amp is OD hex lt lt plus ascii in lower case The RS232 interface uses a standard data lead to connect to a PC Connections are as follows Rx Page 85 O ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL The F600 uses a basic RS232 interface with 8 data bits 1 start bit 1 stop bit and no parity It is only necessary to connect pins 2 3 amp 5 handshaking is not implemented The instrument has a female gender connector Baud rate is selectable via the System Presets menu 9 3 Instrument PC commands The following sections apply equally to USB RS232 and IEEE interfaces The sections cover use of the remote PC commandas These may be sent to the instrument via a simple terminal program through some programming interface from Excel or similar program or interactively with a dedicated program such as ULOG supplied by ASL 9 3 1 Remote mode local lockout The instrument may be set into Remote mode to prevent problems with simultaneous control from a PC and from someone using the front panel keys In Remote mode the instrument can only be controlled over the interface since the F600 s front panel keys are locked out To enable Remo
14. Input channel R Numeric keypad Back key LED indicators Figure 3 1 front panel The graphical display is situated roughly in the centre off the instrument The electrical input connections are situated to the left of the front panel The two indicator LEDs to the right are used to indicate that electrical power is applied and to indicate that the bridge is in standby mode graphical display in low power mode The various controls connectors displays and keys are described in detail in each of the following sections The four keys under the display are soft keys so their function varies with the instrument operating mode whenever these keys can be used their current function is be displayed above each key Page 7 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 3 2 About the VFD display screen The large graphic VFD Vacuum Fluorescent Display screen is your direct link to the instrument presenting you with the measurement results and information relating to them and also to the menus to set and control the instrument The VFD screen is designed for ant reflective viewing under normal ambient lighting The VFD brightness may be set from the menu options see section 5 3 7 3 3 LED indicators Two LEDs are situated to the right hand side of the instrument 3 3 1 Power LED The lower green LED is illuminated when power is applied to the bridge and the bridge is switched on The bridge should be switched off
15. It is entirely your choice whether you choose to apply these firmware updates to your instrument ASL whilst taking the utmost care to thoroughly test both the firmware and the update procedure can not accept any responsibility for any problem or loss resulting from the procedure During the download the process will overwrite the internal F 00 memory This may cause random characters to appear on the display and the position of these characters on the display may change Both conditions are quite normal and will not affect the download 14 3 Firmware update procedure e Obtain a copy of the latest firmware from the ASL website www aslltd co uk and copy the file into the directory indicated by the instructions on the website e Run the program CDM Setup exe from the directory D Downloader replace the D with the name of your CD device if necessary This will install the USB drivers You will see the following message one this is complete Only required when the USB interface is fitted i FTD CDM Drivers have been success ully installed OK 32 Provided on the CD with the instrument Page 121 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL e Install the downloader software on your PC by running the program INSTALL EXE from the directory D Downloader replace the D with the name of your CD device if necessary Follow the installation procedure instructions which require you to enter your name and
16. Once the channel exits the edit screen will be similar to Page 61 32 Channel Edit Curent edit field A 1mA 4 x10K Int 100R 100 0000 PbOO DIN def00 The square brackets are shown around the first editable field The editing functions and procedures are now identical to those associated with probe editing see section 5 3 4 for complete details on changing and entering data Use the Back soft key to return to the previous screen if necessary Edit the fields as required before pressing the Exit soft ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 3 7 System menu This menu displays useful information about dates and version numbers Press the 4 key on the numeric pad or use the up and down keys to navigate to the System Menu and press the OK key to access this menu The display will change to show 4 System 1 Information 2 Display 3 Clock A 4 Calibration 5 Analogue 1 OK 6 Presets v Menu Back Press the 1 key or the OK key to display the system Information screen 41 Information Today 24th March 2007 Manuf ASL Model F600 S W Ver 1V6 22Mar 2007 S No 008677 002 IEEE Adr 06 Calibrated on 01 2007 User data Valid Menu Back EJ CI Press the Menu key to return to measurement mode or the Back key to return to the previous menu Note that the IEEE address is only shown when the interface is installed Page 62
17. Service temperature range Specified operating temperature range Operating relative humidity conditions 11 6 Dimensions and weight Dimensions Weight ASL 10V dc 10 mA Function is range dependent 10V dc 5 mA 1 Hz bandwidth 90Vac 264Vac 95VA max 47Hz 63Hz T3A 250 Vac slow blow 20 C to 50 C 15 C to 35 C 15 C to 25 C lt 80 RH non condensing 150 x 455 x 450 h xw x d 9 kg The F600 has been designed to comply with current standards and safety legislation The instrument complies with IEC61010 1 and conforms to the low voltage and EMC directives Page 116 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual This page is intentionally left blank Page 117 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 12 Cleaning and Maintenance 12 1 Cleaning Make sure the F600 is disconnected from any leads and from the mains supply before cleaning Clean the outside of the instrument with a soft clean cloth slightly dampened with mild detergent Do not allow water to enter the instrument Warning Never use alcohol or thinners as these will damage the instrument Never use a hard or abrasive cloth or brush Always disconnect from the mains supply before cleaning Warning Regularly inspect the mains cable and plug for damage 12 2 Maintenance Keep the instrument and its leads clean with occasional calibration checks In particular the connectors
18. The numeric keypad is also active The Menu key can be used to return to measurement mode The Back key will cause the instrument to return to the previous menu measurement mode if the top level menu is already shown 0 Top 1 Statistics 3 Channel GIG annels A 4 System Menu OK Menu Back LI CI The following sections describe each of these menus and their sub menus where appropriate The statistics menu is shown below as an example of sub menu Note The navigation cluster Back key will return to the previous menu 5 3 1 Password Some menus are password protected menus 22 32 44 45 and 46 A password must be entered before these can be used The password is 9900 followed by the Enter key Page 49 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 3 2 Statistics menu Press the 1 key on the numeric pad or the OK key to access this menu to show 1 Statistics Mean 1 000000 Diff No i 0 1342 Max 0 999999 Min H 1 000001 Std Dev 0 00001 Clear LI LJ L The Back soft key may be used to reset and restart statistical calculation Press the Menu key Menu Back to return to measurement mode or press the Back key to return to top level menu Page 50 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 3 3 Probe Review menu This menu is used to Review probe information All probes used on the F600 must have the correct data entered to accurately perform the resis
19. This provision allows primary calibrations to be carried out with suitable PRTs over reduced ranges 34 Note that each of these fixed points has an uncertainty associated with it Page 124 ASL 2008 F600AC 14 001 2 8 ASL F600AC User Manual and will be of special importance to metrology standards departments which need to make precise measurements at ambient temperatures e The part of the ITS 90 scale which may be measured by PRTs extends from 83 8058 K C189 3442 C to 961 78 C The actual range of temperatures which may be measured depends on the type and range of the PRT used The ITS 90 scale requires the entry of 6 constants into the F600 before the instrument can accurately convert resistance to temperature for a particular PRT The constants are conventionally called Roo1 Ap Bp Cp Dp An Bn and W Page 125 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 17 Appendix 4 DIN standard 17 1 DIN 43760 1980 IEC 751 The DIN standard uses defined values for the conversion of resistance to temperature using the Callendar van Dusen equation No data entry for the probe is required since the coefficients are predefined The DIN coefficients are defined as Ro 100 ohms A 3 90823 x 10 B 5 7750 x 107 C 4 183 x 10 12 The F600 will provide accurate resistance to temperature conversion based on these values when DIN conversion is selected for a probe Page 126 ASL 2008 F600AC 14 001 2
20. User Manual 5 2 12 Func function shift key Press the Shift function key followed by the Func shift key to show the function menu Select Func Complement Two functions are currently available 1 Abridge complement check and 2 A probe self heating check Use the A V navigation keys to select the required function 5 2 12 1 Complement check This test is useful to confirm that the bridge is operating correctly Press the OK key to select this function The following screen will appear Complement Press key to save reading Meas A LJ Page 45 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Choose two similar stable resistors and attach these to the Rr and Rs inputs Follow the on screen instructions Press the Meas A soft key to take the first reading The screen will change to Complement A 1 00100 Swap amp press key for reading B Meas B LJ Swap the resistors and press the Meas B soft key to take the second reading The screen will change to Complement A 1 001000 B 0 999000 Comp 1 000000 Exit LJ The two ratios should complement each other i e multiplying the two together should result in a value of 1 000000 2 ppm in the example the two ratios are 0 999000 and 1 001000 multiplying these gives 0 999000 x 1 001000 1 000000 The F600 does the multiplication automatically Page 46 ASL 2009 F600AC 14 001 2 9 ASL F600AC Use
21. added Issue 2 6 31 October 2008 Information on IEEE and command termination clarified Measure Readall command corrected Issue 2 7 20 February 2009 Section 9 4 4 Parameter 3 changed to parameter 2 for root 2 setting Added section 1 4 on balance condition Address details updated Issue 2 8 28 July 2009 Details updated for latest version of software Minor clarifications Default DIN coefficients corrected Issue 2 9 8h November 2009 Section 9 4 6 gain setting parameters corrected RS232 interface details added Manual balance command CONF MSET details added Page ii O ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Contents CONVENTIONS USED IN THIS MANUAL eeeeeen eene nnne nn nnne nnnm nnne nasa insana sns assu nass nasa ennnen nnmnnn annann VII SIFUCTUrS Of MANU foci ad de vii lae u vii Warnings GN NOTICES RETE vii IMPORTANT SAFETY INFORMATION ccssccceseeessecesseeceseanenseeeenseeesnaesesneeenseeeseaesesaeenseaesnesesnansnsnensnseass Vill IMPORTANT INSTALLATION INFORMATION ccccceecssecesseeenseeessseeessaesnsneeenseeeseaeseseaesnseeessaeeesnaesnneeeenseeensas X IMPORTANT PROBE SAFETY INFORMATION ccsccecsseccesseeenseeeenseeessaeseseceenseeesnaeeesnaesnseeesnseeessaeseneanenseaenss XI IMPORTANT DISPOSAL INFORMATION mmnrmnnmmnnnmmnnmmnnnnmennnnnennnnennnnnnennnenennnennnnnnnnnne
22. by 2 lt base gt 0 Gain set to Gain set to 1x10 2 Gain set to 1x102 3 Gain set to 1x108 4 Gain set to 1x104 5 Gain set to 1x105 6 Gain set to 1x106 Function Sets the active channel s gain Example COMF GAIN lt space gt 3 1 lt cr gt sets the active channel s gain to 20 9 4 7 CONFigure GAIN Command CONF GAIN CONFIGURE GAIN Returns lt multiplier gt lt base gt lt cr gt formatted to 2 significant digits Function Returns the active channel s gain setting Example CONF GAIN lt cr gt command 03 01 lt cr gt lt lf gt response returns the active channel s gain settings of 20 9 4 8 CONFigure FILTer filter Command CONF FILT filter CONFIGURE FILTER filter Returns None Parameters filter 0 0 1Hz 0 5Hz 2 1Hz 3 2Hz 4 5Hz Example CONF FILT lt space gt 4 lt cr gt sets the filter to 5H2 Page 91 ASL 2009 F600AC 14 001 2 9 F600AC User Manual 9 4 9 CONFigure FILTer Command Returns Function Example ASL CONF FILT CONFIGURE FILTER filter Returns the currently active channel s filter setting CONF FILT cr command Ol lt cr gt lt lf gt response returns the active channel s filter setting of 5Hz 9 4 10 CONFigure AOUT lt type gt lt channel gt lt scale gt lt high gt lt low gt lt zero gt Command Returns Parameters Function Example Page 92 CONF AOUT type channel scale high low zero CONFIGURE AOUT
23. case of the gain and current menus which are limited by instrumental considerations Page 24 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual e Method 1 Use the A and V navigation keys to scroll the selection inverse video line through the available options e Method 2 Use the soft key under the menu to scroll the selection inverse video line through the available options e Method 3 Use the numerical keypad to set one of the available options for example pressing the number 4 will set the units immediately to kelvin Press the Units key or the OK key in the navigation cluster or the Back to return to normal operation The Specific function keys are described in detail in the following sections The default values are shown in each section Note that it is not necessary to press the current function key or OK key to move to another menu simply pressing a function key will immediately move there Page 25 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 1 Automatic Manual balance function shift key Press the Shift function key followed by the Auto Man shift key to toggle the balance mode between Automatic and Manual the change to the balance method is implemented immediately The bridge may be balanced manually ratio only or set to balance automatically The current balance mode is indicated by the letters M Manual or A Automatic on the top line A logarithmic balance meter i
24. conversions see below Ratio 0 021862 Ohms 218 6249 Deg C 318 511 Deg F 605 320 kelvin 591 661 LJ 5 1 3 Measurement mode graphical Disp function key Press the Disp key to change the display from normal measurement mode to graphical display mode shown below CH 00 218 6321 R 218 640 Current channel and reading 218 610 _ 3 0 min Clear Figure 4 2 F600 graphical display mode The screen shows a record of measurements The display automatically scrolls to the left once the initial x axis period has been displayed starting from the left hand y axis i e the 10 The x axis scale depends on the filter setting time between samples 6 minutes for a 2 second update rate Page 22 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual most recent value is displayed on the right hand side The F600 automatically rescales the y axis when when the graph is first displayed pressing the Scale key will refit the graph to the screen As points are added the horizontal axis of the graph increases to display the new points At some time the early points will be removed from the start possibly leaving the horizontal scale too large for the points being displayed Instead of re starting the graph and losing valuable history hit the scale key and the horizontal scale will re adjust to fit all the displayed points Pressing the Disp key will change from thi
25. if it is not to be used for a long period of time 3 3 2 Standby LED The upper orange LED is lit whenever the bridge is in standby mode In this mode the VFD display is turned off saving power and prolonging the display s life the remainder of the electronics is powered normally during standby to ensure the instrument is stable and ready to use at a moments notice See the section on the Disp function key for further details 3 4 The keypad The instrument s keys are grouped by type and consist of nine Function keys a twelve key Numerical keypad a Navigation and OK cluster of keys four Soft keys and separate Menu and Back keys The combination of Function and Soft keys lets you choose how to access data and or functions within the instrument The F600 keypad is shown in figure 3 1 and in more detail in figure 3 3 The keys are used to select the various menu options and to control the instrument Generally no more than one menu level is required for the commonly used settings A few infrequently used options require two or three menu levels Operation is very simple and straightforward once you are familiar with instrument It may help to have the instrument to hand when reading through These sections The functions under the keys are accessed by pressing the right hand MODE key and then the required key e g to access the Probe menu press Shift and then the Chan key Refer to section 5 for a detailed description of how to us
26. immediately if any of these items are missing or damaged Please retain the packaging In case of return servicing or calibration use the original packaging Failure to do so may invalidate the warranty and or incur additional costs outside the warranty period Please contact your agent dealer or supplier when the original packaging is unavailable 2 3 Setting up temperature measurement To enable accurate resistance to temperature conversion to be carried out by the instrument PRT characterisation data is required for both temperature conversion algorithm DIN CvD or ITS90 and temperature conversion algorithm coefficients The probe conversion algorithm and its coefficients can be stored in the instrument s internal non volatile memory Each probe setting stores one set of PRT characterisation data up to 99 settings can be stored 2 Thermometer probes and other accessories if ordered will be supplied separately Page 5 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Up to 99 channels can be stored for the instrument Each channel contains a complete set of instrument set up conditions this saves the user from resetting the instrumental conditions every time a different set of operating conditions is required Set up for the probe channels and calibration data is covered later in the manual 2 4 Getting started Read the manual thoroughly before using the instrument Unpack the instrument and a
27. in order of arrival so more than one command can be sent to the instrument without waiting for the previous one to complete However it is normally easier to wait for the expected response before issuing the next one especially when a response is expected 9 2 Interfaces The USB interface is fitted a standard The optional IEEE or RS232 interface while using a completely different means of transporting data works in the same way as far as the command structure is concerned The specific difference between the data transport methods are covered in the two sections below 9 2 1 USB device driver The USB PC interface will normally be installed as a virtual COM port driver simulated serial port An interval of Ims to 2 ms should be allowed between transmitted characters The communication protocol is Bits per second 9600 Data bits 8 Stop bits Parity none Flow control none This baud rate may be changed at any time using the Instrument Preset screen Page 83 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Use the menu system on the CD to load the device driver alternatively run the program CDM Setup exe from the directory D NUSB Drivers on the CD supplied with the instrument24 This will install the USB drivers You will see the following message once this is complete i FTD CDM Drivers have been success ully installed OK When writing a control program for the instrument it may be eas
28. ince basa Sc cra sna Se DE secu ae as sgun tete 113 10 1 PAS COSSOMES ri 113 11 G lle wuer LE 115 11 1 Resistance thermometer measurement sise 115 11 2 Bele dE 115 US ANGIOQGUS e jo 116 11 4 Loti Elee 116 RP ge leen e TT 116 11 6 Dimensions and weight sise 116 12 CLEANING AND MAINTENANCE cccssssessscessenensecessseeessaeenseeeenseeeseaesesaeenseeeseesessaeseneanensesenss 118 12 1 Gea 118 12 2 Maintenance sun ina E A E ananas hante 118 13 SERVICE AND WARRANT Y areae a amaaan deeg 120 13 1 TSCANICAlSUPRONT PES 120 14 APPENDIX 1 FIRMWARE UPDATE eereeeeee eene ne nnnm enn nenne nnns antena nnns NEEN nasa anna sane nsn nn nis 121 14 1 Firmware UPAAtSS ise EE 121 14 2 Firmware update disclaimer sise 121 14 3 Firmware update procedure esses eene enne nnne nennt ARAE nnns 121 15 APPENDIX 2 CALLENDAR VAN DUSEN eeeeeen nennen enne nn nnne na nnn NEEN nasa ennen nannan enne 123 15 1 Callendar van Dusen equation CM 123 16 APPENDIX 3 IRSCH 124 16 1 International Temperature Scale ITS 90 is 124 17 APPENDIX 4 DIN STANDARD mnrmnnmmnmmmnnmmnnnmennnmennennnnnnnsnnnennnnnnnnnnnnnnennnennnns 126 17 1 DIN 43760 T1980 EC 751 she en ori eot entre te ten teri aise oc dat d 126 18 APPENDIX 5 AC BRIDGE OPERATION cccc seccceseeeee
29. is currently invalid 9 4 18 MEASure CHANnel channel Page 95 Command Returns Function Example MEAS CHANNEL channel MEASURE CHAN channel None Sets the instrument to the active channel specified Aborts the current measurement cycle Clears the last measurement from the display Clears the output buffer Continues measuring with this channel s settings MEAS CHAN lt space gt 23 lt cr gt makes channel 23 the currently active channel ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 9 4 19 MEASure CHANnel Command Returns Function Example 9 4 20 MEASure READ Command Returns Parameters MEAS CHANNEL MEASURE CHAN Currently selected channel Returns the currently selected channel MEAS CHAN cr command 23 lt cr gt lt lf gt response returns with the active channel of 23 MEAS READ MEASURE READ measurement units flag measurement last measurement value units current units for the active channel see below Degrees Celcius Degrees Fahrenheit Kelvin Resistance ohm s Ratio e dm flag B Balanced L too Low H too High Exx error state see below Exx Description EOT Invalid reading E02 Open probe E03 Reserved E04 Ratio over range exceeds maximum value of AC 4 99999 DC 9 999999 E05 Ratio under range less than minimum value of 0 0000000 EO6 Ratio not a real value i e divide by zero E07 Reserved E08 Resis
30. near any strong magnetic fields Y Locate the instrument on a suitable and secure surface Y Ensure air can freely circulate around the instrument The instrument uses a universal input voltage power supply Use a plug to connect to the mains supply If in doubt consult a qualified electrician The supply connections are shown below if a UK cord set is fitted Brown wire to Live Line L Blue wire to Neutral N Green and Yellow wire to Earth Ground E Warning The instrument is designed to be connected to the mains supply via a plug and must be effectively earthed Page x ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Important probe safety information Care must be taken with probes used with the instrument The following safety information must be observed x Do NOT attempt to lift the F600 by any of the leads Y Do ensure that long probe leads are kept away from areas where people could trip over them or become tangled in them Y Do ensure the probe leads are kept in good condition Warning Because of the nature of the instrument probes can be excessively HOT or COLD during use Take suitable precautionary measures when handling probes Take care that you and other people working in the same area do not come into contact with the metallic probe or the insulating sheath near the probe which will also be hot cold Precautions apply both during use or when moving the probe from one position to anot
31. or offsets will be compared with the other zero input and will give a non zero value There is no need to fit the Rsresistor if the internal reference is used however a resistor must be fitted to the Ri terminals and the bridge parameters must be set so that a valid balance can be obtained with the Rr value connected Remember to select automatic balance unless you wish to manually balance the bridge The bridge should display zero to within 2 ppm in ratio mode Press the Shift key and then the 202 shift key to start zero balance mode use the same key sequence to exit zero balance mode 5 2 1 5 Unity balance mode The F600AC Bridge has an internal unity check facility This mode is useful to confirm that the bridge is operating correctly Selecting the unity check causes the common point of the inductive divider secondary to be connected to the R side of Rs This should give a balanced result of 1 000000 There is no need to fit the Rsresistor if the internal reference is used however a resistor must be fitted to the Rr terminals and the bridge parameters must be set so that a valid balance can be obtained with the Rr value connected Remember to select automatic balance unless you wish to manually balance the bridge The bridge should display unity to within 2 ppm in ratio mode Press the Shift key and then the 212 shift key to start unity balance mode use the same key sequence to exit unity balance mode Page 30 A
32. probe or resistor may become significant Note that the instrument s performance will not be optimised if the current is set too low E 2 3 4 im Cle 6 7 8 Set Current 2mA 0 1 5mA 1 sqrt 2 10mAV The F600 s currents may be set to Page 35 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 100 pA 200 uA 500 uA 1 mA 2 mA 5mA 10 mA V2x100 uA V2x200 uA N2x500 uA 2x1 mA 2x2 mA Q2xbmA 2x10 mA The x 2 setting doubles the power in the probe or resistor and is useful when checking for self heating effects Pressing the 1 and 5 keys on the numeric keypad will show the display below Note that the Confirm legend has appeared above the 3 soft key this is used to prevent any menu changes from taking effect immediately Either press the Confirm soft key and note that the display will return to the one shown above or press the OK key and the display will return to the measurement mode Pressing the Curr key or Back key will return control to the top level measurement menu without altering the current value Set Current i Page 36 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 2 6 Root 2 42 function key The Root 2 N2 function key does not have a menu associated with it Press the Shift function key followed by the V2 shift key to toggle the current between x1 and xv2 this is indicated by the letter Isqrt and Ic legends on the display see be
33. to navigate to the Channel Menu and press the OK key to access this menu 3 Channels 1 Review 2 Edit OK Menu Back LJ CI Press the 1 key or the OK key to Review the previously entered channel data Use the Last Page not visible on the first page and Next Page soft keys to move between pages to review channel information The screen below shows that channel 00 system default and channel 05 have been set and their associated values Type Ic Rt 1mA Rata RER Re CC TTT Rt 1mA CC ers CC TTT C9 A de d e eek Last Page l menu Page 58 Ref 01i empty empty empty empty 10e empty empty empty empty empty empty Value Probe Seq 100R0 4PRTOO Xx xd Re Xxx dde dde ee xcd ee 25R0 4PRTOO Xxx dde Re Xxx dde xcd ee Xxx kde Xxx xd e dk eR e eR RE Next Page Press the Menu key to return to measurement mode or the Back key to return to the previous ASL 2009 Channel 00 probe number 42 is a 4 wire PRT for channel 00 using an internal 100R reference resistor and 1 mA on the R input Menu Back EJ CI F600AC 14 001 2 9 ASL F600AC User Manual 5 3 6 Channels Edit menu A channel holds a channels setup under its identification number This menu may be used to Edit individual channel information Channels may be set to either measurement R or reference Rs types Press the 2 key on the numeric pad or use the up and down keys to
34. type channel scale high low zero None type 0 Measurement Balance in manual mode lt channel gt 0 to 99 Which channel to apply to lt scale gt 1000 to 0 01 Scale factor in units volt lt high gt 10 0 to 10 0 Maximum output in volts lt low gt 10 0 to 10 0 Minimum output in volts lt zero gt Real or exp number Value to offset the output in units Sets the analogue output parameters Two modes of operation can be set Either the output is based on the current unit measurement Output V Measurement Zero Scale or the error signal is output Output V Error Note that the values of zero amp scale are unit less and will apply to the active channel s units e g zero 10 0 scale 100 will adopt the units of the instrument CONF AOUT lt space gt 0 02 10 0 5 0 5 0 1 0 lt cr gt Sets the analogue output voltage on channel 2 with a gain of x 10 symmetrically about 1 0 and limiting the output to 5V of full scale So if CH2 1 1 the analogue 1 output 1 0V and if CH2 0 75 the analogue 1 output 2 5V ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 9 4 11 CONFigure AOUT Command Returns Function Example CONF AOUT CONF AOUT type channel scale high low zero formatted to 2 places Returns the active channel s AOUT settings CONF AOUT cr command 0 02 10 00 5 00 5 00 1E01 cr If2 response returns the active
35. 001 2 9 Page 106 ASL Notes F600AC User Manual Channel 00 is not edittable There is a limit of 100 channels that the system can hold 9 4 4 CH RT lt nn gt lt mm gt Page 107 Command Returns Parameters Function Errors Notes Example CH RT nn mm None nn mm Delete channel nn mm for security E00 Unrecognised command E01 Command is not part of CH series E02 Missing parameter i e nn mm E03 nn exceed allowable probe limit or nn is not equal to mm E04 Channel nn doesn t exist E05 Channel is type Rs not Rt Cannot delete Channel OO If the channel to be deleted is currently selected for measurement then on deletion this will be changed to channel 0 CH RT 13 13 cr command ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 9 4 42 CH RT li Gg U amm PP Command CH RT li Gg U amm PP Returns None Parameters See tables below Function Sets the Rt channel setting based on the following Errors EO0 Unrecognised command E01 Selected channel is not valid E02 Command is not part of CH series E03 Channel is not of type Rt E04 Too many few parameters should be 5 EOS li 1t parameter li error E06 Gg 2nd parameter error EQ7 U 3 d parameter error EO8 Rs 4th parameter Exceeds Number of reference channels EO9 Rs 4th parameter Channel does not exist or channel is not of type Rs E09 PP 5th parameter Exceeds Number of pr
36. 00AC 14 001 2 9 ASL F600AC User Manual 22 Probe Edit Probe 01 pbo1 4 Wire DIN 100 3 908300010e 03 5 775000000e 07 4 183000000e 12 Menu Back Press the Edit soft key to get to the following screen 22 Probe Edit Ea itfield Name pb01 A z l a z Space II Next Menu Back Ly L1 Use the A Z and z a soft keys to enter the probe s name using the and P gt navigation keys to move through the current data field the field with the and brackets Use the and navigation keys to move the edit position left or right Use the A and Y navigation keys to move between fields The following display will be shown when one of the numeric edit fields is selected 1 These keys are also used to scroll through the available options on the Wire and DIN fields The 3 Wire option will be used for new switch boxes Page 55 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 22 Probe Edit 3 908300e Press the Insert key and the following screen will be displayed Insert Delete Space I Exit l 22 Probe Edit 3 9083000100e 03 Menu Back EJ CI Ld Oo LJ L The remaining digits may be edited added or changed as required using the numeric Exp keypad The function of the various editing soft keys is fairly obvious described by their legends If pressed the Insert soft key will change to Overtype If Insert is then pressed it will revert to Overty
37. 00AC 14 001 2 9 F600AC User Manual ASL 4 Sensor and reference resistor connections The F600 Bridge is designed to operate with four terminal resistors or four terminal resistance thermometers and includes comprehensive guarding circuits Probe connection information is shown below Two wire PRTs must be connected similarly to four wire devices either at the sensor preferred for accuracy or at the input connector Since the measurement method relies on accurately measuring the ratio of two resistors and since the bridge is limited to a 5 1 ratio the measured resistor must not be greater than 5 times the value of the reference resistor External Reference not used or connected Figure 4 1 connections when using an internal reference resistor The screen connection may be used when noise is an issue In this case both connections to the BNC must be screened together and this outer screen is connected to the Screen connection Note The outer conductor of the BNC connectors is not at earth potential and should not be earthed Page 16 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Sensor Reference Figure 4 2 connections when using an external reference resistor 4 1 1 Connection and guarding Two coaxial BNCs are provided for connections to each resistor The normal four terminal connection arrangement is shown in Figure 4 2 The lower coaxial connector of the Rr and Rs connector pairs is the cur
38. 1 C101 01 lt cr gt lt lf gt response root 2 x1mA gain x20 celcius internal Rs 01 probe 01 9 4 44 CH RS lt nn gt lt mm gt Command Returns Function Example Errors Notes CH RS nn mm None Adds external reference channel channel 0 setting are copied The value nn mm for security CH RS 08 08 lt cr gt command EO0 Unrecognised command E01 Command is not part of CH series E02 Missing parameter i e nn mm E03 nn exceed allowable probe limit or nn is not equal to mm E04 Channel nn already exists Channel 00 is not edittable and is always Rt There is a limit of 100 channels that the system can hold 9 4 45 CH RS lt nn gt lt mm gt Command Returns Page 110 CH RS nno mm None ASL 2009 F600AC 14 001 2 9 ASL Page 111 Function Example Errors Notes F600AC User Manual Deletes reference resistor channel nn confirmed as mm for security CH RT 08 08 lt cr gt command EO0 Unrecognised command E01 Command is not part of CH series E02 Missing parameter i e nn mm E03 nn exceed allowable probe limit or nn is not equal to mm E04 Channel nn doesn t exist E05 Channel is type Rt not Rs If the unit has the channel to be deleted selected for measurement then on deletion this will be changed to channel 0 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 9 4 46 CH RS E lt n nnnnnnE ee gt Command CH RS
39. 8 undefined This screen shows that two external reference resistors have be added to the instrument channels 7 and 8 but that channel 8 has not had an actual value entered for the reference resistor yet The two internal reference resistors are set their values are Nominal values 25 Q 100 Q V t is important to realise that the number in the field is only a reference value the actual value is entered via the calibration menu Page 43 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 11 Probe selection function shift key Up to 99 probe selections may be made provided these have been entered Note Probe 0 def 00 is predefined as DIN and cannot be changed Press the Shift function key followed by the Probe shift key to show the probe menu Temperature conversion method e robe name Probe Pb00 DIN def00 Highlighted A list of available probes will be shown Use the A W navigation keys to scroll the highlighted line up or down the list Press the OK key to select the highlighted probe or press the Chan key to select the highlighted probe and return to measurement mode alternatively press the Back key to return without altering the probe Note Note that the OK key immediately selects the highlighted line but does not return to normal measurement mode allowing you to view other probes details Page 44 ASL 2009 F600AC 14 001 2 9 ASL F600AC
40. 99 channels instrument setup configuration Overall system accuracy depends on the reference resistor quality and calibration see the specification section Resistance ratio measurement accuracy is better than 2ppm at 20 C 2 C equivalent to a temperature measurement precision of 0 5mK 1 Depends on Rs and current values Page 1 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 1 2 Definitions and terminology i 0 C 273 15 K ii 1 mK milli kelvin 0 001 C one milli degree Celsius iii 1 milli degree C 0 001 C Im C ImK 1 8m F iV 1 milli degree F 0 001 F 1m F 0 56mK 0 56m C V Alpha or o is the temperature coefficient or temperature sensitivity of the platinum wire used in PRTs In general the higher the alpha value the better the PRT thermometer measurement reproducibility stability and performance vi Abbreviations for platinum resistance thermometers include PRT Platinum Resistance Thermometer Pt100 PRT with nominally 100 Q resistance at 0 C RTD Resistance Temperature Device vii System accuracy refers to the overall combined accuracy of the F600 and thermometer 1 3 Principles of measurement The F600AC Bridge measures the voltage V developed across the unknown sensor resistance R and the voltage Vs across a stable internal or external reference resistance Rs The voltages are proportional to the resistances so the thermometer resistance is derived
41. ASL F600AC User Manual Rack mount version shown F600 Precision AC Thermometry Bridge User Manual Issue 2 9 This manual supersedes all previous versions please keep for future reference Page ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Revision history Original version 3 April 2007 Issue 1 Previous releases Provisional copy only for intemal review Issue and date Description of change Issue 2 0 6 June 2007 Added information on modified editing keys Minor typographical changes Revised channel menu and shift keys described ssue 2 1 3 Dec 2007 Information on shift keys added Added details on balance time to manual amp automatic modes Added information on complement check Minor text modifications ssue 22 14 Jan 2008 Modified A M to Auto Manual and mention of flashing errors Issue 2 3 25h Feb 2008 Amendments to screen display details ConfigureCurrent the v2 parameter was 2 now 3 example changed Changes to Probe and Channel descriptions Various changes to reflect latest data sheet Other minor edits baue 2 4 234 June 2008 Information on typical setup conditions added Modified for ULOG release Added password information New serial commands covered Meter information updated Note on connecting resistors added ssue 25 11 September 2008 Information on IEEE interface added USB information added to Battery disposal information
42. ID lt cr gt commana 05 cr If response lt gt lt cr gt lt lf gt response when probe not present EO0 Unrecognised command E01 Command is not part of PB series E03 nn exceeds allowable probe limit There is a limit of 100 probes that the system can hold 9 4 27 PB lt nn gt lt mm gt Command Returns Parameters Function Example Errors Notes PB nn mMmm None nn mm Add the probe to the unit and configures it for default parameters PB 05 05 command E00 Unrecognised command E01 Command is not part of PB series EO2 Missing parameter i e nn E03 nn exceed allowable probe limit or nn is not equal to mm E04 nn already exists Probe ID 00 is not edittable There is a limit of 100 probes the system can hold The parameter is repeated for security ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 9 4 28 PB lt nn gt lt mm gt Command Returns Parameters Function Example Errors Notes PB nn yy None nn mm Delete the probe from unit PB 05 05 command EO0 Unrecognised command E01 Command is not part of PB series E02 Missing parameter i e nn mm E03 nn exceed allowable probe limit or nn is not equal to mm EOA nn already exists Probe ID 00 is not edittable There is a limit of 100 probes that the system can hold The parameter is repeated for security 9 4 29 PB NM lt ssssssssssssss gt Command
43. ION CMG QUCIOIAQ ee Presa PERRA a aa a online 17 412 TIwodermnindal resistOrs iine reatu d ae nud uta nan uan au d duda ad aeu nd nad dun ee dead 18 4 1 3 Resistor current selection eese essent ennt nnns 18 Page iii ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 ield2 Area db ccc 20 5 1 Instrument operating Duo e EE 20 5 1 1 Measurement mode mom 20 5 1 2 Measurement mode alternative display 21 5 1 3 Measurement mode graphical Disp function key 22 5 1 4 Measurement mode standby Disp function key 23 5 2 Setting the instrument s operating conditions ss 24 5 21 Automatic Manual balance function shift key 26 5 2 1 Automatic balance normal mode sse enne 27 5 2 1 2 Automatic balance meter 27 o2 ul ue Le e nl 28 52114 Zero Be e ue MOJE E 20 6 2 1 5 Unity balance e le e EE 20 50 222 JUnife eelef EE 31 S2 Aer UNCON KOV T EET 32 524 GOINTUNCIONMKOY Pm 33 9 2 5 Curr ent FUNCTION Key nn aa an e ku R PR ERRARE RE XAR ER ERROR RE RR RR OR ERRARE are 35 5206 ROOT 2 V2 FUNCION RON nent nids Delta suonerie nass Ru dg 37 O 2 7 e Ree e 38 9 2 6 Zero FUNCTION E 39 5 2 9 Chan Ree 40 5 29 1 Channel sollech ss ander hne tk nuhi nh rte en irn nni dame 41 5 2 10 Reference resistor function shift key ss 42 5 211 Probe selection function shift ke 44 92 12 1 FUNC f nctlon shift Key aer nts tanen inna en na Ra gen n dattes de tentait en a SR pui da 45 5 2 12 1 Comp
44. Returns Parameters Function Example Errors Notes 9 4 30 PB NM Command Returns Parameters Page 100 PB NM ssssssssssssss None Probe string Sets the probe name PB NM s n 00123456 ASL lt cr gt command EO0 Unrecognised command E01 Command is not part of PB series EO2 Probe ID not valid E03 Missing parameter i e sssssssssss E04 sss parameter exceeds the maximum length The maximum probe name string length is 31 characters PB NM The probe name as a string sssssssssss None ASL 2009 F600AC 14 001 2 9 ASL Function Example Errors Notes 9 4 31 PB WR lt n gt Command Returns Parameters Function Example Errors Notes 9 4 32 PB WR Page 101 Command Returns Parameters Function Example Errors F600AC User Manual Returns the probe name PB NM cr PB NM s n 00123456 ASL lt cr gt lt if gt command response EO0 Unrecognised command E01 Command is not part of PB series The maximum probe name string length is 31 characters PB WR n None Probe type Sets the probe connection type PB WR O cr command EO0 Unrecognised command E01 Command is not part of PB series EO2 Probe ID not valid E03 Missing parameter i e n E04 n parameter value not valid Currently only 4 wire connection possible with this unit PB WR The probe connection type 0 4 wire 1 3 wire None Gets the probe
45. SL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 2 2 Units function key Press the Units function key to show the units menu Select the units you require using the soft key the A V navigation keys or the numerical keypad the change to the current value is implemented immediately Press the OK key the Units key or the Back key to return to normal measurement mode Set Units The effects of the Units selection menu are shown in the table below Description Function Ratio Normal operation Show measured ratio Ohms Convert ratio to ohms and display DegC Convert ratio to celcius and display DegF Convert ratio to farenheit and display kelvin Convert ratio to kelvin and display Page 31 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 3 Filter function key Press the Filter function key to show the filter bandwidth menu Select the bandwidth you require using the soft key the A W navigation keys or the numerical keypad the change to the current value is implemented immediately Press the OK key the Filter key or the Back key to return to normal measurement mode Five bandwidth filters are available as shown below Select the one that best matches and is consistent with the physical time constant of the process you are measuring The smaller the bandwidth value the better the noise reduction however noise reduction is achieved at the expense of response to fast changing p
46. SL 2009 F600AC 14 001 2 9 F600AC User Manual ASL directly to the resistor assemblies it is recommended that the join between the resistor leads and the coaxial cables is made with the FA 3 adaptor box Flying leads from the resistor assemblies should be twisted in two pairs the current I leads together and the voltage V leads together 4 1 2 Two terminal resistors Two terminal resistors can be used with the Model F600 Bridge Two terminal resistors must be converted to four terminal devices to take full advantage of the instrument s performance The connector leads should be soldered on to each lead of the two terminal resistor as shown in Figure 4 3 Standard coaxial cables should be used for connection to the F600 Bridge In the case of a two terminal thermometer the FA 3 adaptor box should be used The thermometer leads should be connected so as to link the two high terminals together and likewise for the two low terminals External Reference may or may not be connected em Figure 4 3 modification for a two terminal resistor 4 1 3 Resistor current selection The normal resistor current setting is IMA higher and lower settings can be used To maintain the bridge within operating limits the IR voltage drop on the standard resistor should not exceed 200mvV rms on the input This limits the Rs resistor to about 200 ohms when using the 6 Note that the voltage sense connections should be soldered nearer to the resistor or s
47. See table below CFm Din Cvd ITS90 CFO RO RO RO 01 CFI A A AP CF2 B B BP CF3 C eR CF4 DP CF5 AN CF6 BN CF7 W PB CF3 4 183000E 12 lt cr gt command E00 Unrecognised command E01 Command is not part of PB series E02 Probe ID not valid E03 Missing parameter i e n nnnnnE ee E04 n nnnnnE ee parameter value not valid The parameter n nnnnnE ee is limited to between 1E 50 and 1E 50 PB CFn The probe temperature conversion parameter n None Returns the probe temperature conversion parameter n See previous command for details ASL 2009 F600AC 14 001 2 9 ASL Example Errors Notes 9 4 37 CH ID lt nn gt Command Returns Parameters Function Example Errors Notes 9 4 38 CH ID Command Returns Parameters Function Example Errors Page 105 F600AC User Manual PB CF3 cr command 4 18299999E 2 cr lIf response E00 Unrecognised command E01 Command is not part of PB series ie CFn EO2 Probe ID not valid The parameter n nnnnnE ee is limited to between 1E 50 and 1E 50 CH ID nn None nn Select local channel nn for editing CH ID 17 cr command EO0 Unrecognised command E01 Command is not part of CH series EO2 Missing parameter ie nn E03 nn exceed allowable channel limit Channel 00 is not edittable There is a limit of 100 channels that the syste
48. Selected units Aut 12 02 03 Mean 1 000000 Diff No 0 000001 1342 Reference resistor Max 1 000000 value and type Min 0 999999 Std Dev 0 00100 Difference and number of readings Statistical results Figure 4 1 F600 display screen The currently selected channel and probe here 0 is the default for both are always shown at the top left of the display 7 However measurements are still displayed in menu mode whenever possible 8 The display may be toggled between this view and a graphical display using the Disp key Page 20 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual This display always reflects the operation of the instrument showing the current reading and settings Readings are updated at the selected filter rate 5 1 2 Measurement mode alternative display There are four soft keys are under the display The action of these keys is context sensitive their action generally depends on the text above them on the screen Two of these keys left hand side are active when the display is in normal measurement mode The far left soft key toggles the screen between Gain and Filter display see above and below Freq 55 Depends on the filter value selected Page 21 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL The other active soft key second to left in normal measurement mode toggles between normal measurement mode and the screen showing multiple unit
49. Stem length 450mm quartz R100 Ro 1 3925 minimum Reproducibility 0 01K or better Range 189 C to 650 C Physically similar to T25 650 1 but with Ro 100 0 05 ohms Suitable for use in laboratory environments but not for general industrial applications Range 189 C to 650 C Secondary transfer standard PRT 25 5 ohm 4 wire with 4 metres connecting cable to spade terminals Range 0 C to 650 C Working reference PRT Ro 100 ohms 2 meter cable with spade terminals Stem length 450mm stainless steel with quartz liner Range 100 C to 450 C Alpha 0 00385 As T100 450 2 except Alpha 0 00392 Working reference PRT Ro 100 ohms 2 meter cable with spade terminals Stem length 460mm quartz Range 50 C to 600 C Alpha 0 00385 High Temperature standards PRT Ro 0 25 ohms Range up to 962 C 10 channel automatic remote scanner Current source for unselected PRTs Four oven controlled reference resistors for systems applications 1 10 25 amp 100 ohms Oil filled Standards resistors 1 10 25 100 amp 1000 ohms Laboratory Reference Resistors 1 10 25 100 amp 1000 ohms Thermal enclosure for RW amp RR resistors ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL This page is intentionally left blank Page 114 ASL 2009 F600AC 14 001 2 9 ASL 11 Specifications F600AC User Manual 11 1 Resistance thermometer measurements PRT characterisation Ratio r
50. and efficiently restore a previous saved setup Alternatively they can be set to use the instrument efficiently with an external switch box External channels may be set to perform either as R or Rs inputs Page 41 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 10 Reference resistor function shift key One of two internal reference resistors or up to one of 99 external reference resistors may be selected Press the Shift function key followed by the Rs shift key to show the reference resistor menu Note External reference resistors are entered as Rs channels Nominal resistance Actuall resistance Int 25R0 25 0041 Highlighted A list of available reference resistors will be shown Use the A W navigation keys to scroll the highlighted line up or down the list Press the OK key to select the highlighted reference resistor or press the Rs key to select the resistor and return to measurement mode alternatively press the Back key to return without altering the reference resistor Note Note that the OK key immediately selects the highlighted line but does not return to normal measurement mode allowing you to individually view the effects of the change and to select other resistors Page 42 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual As an example once the highlighted line has been scrolled down three times the display will change to one similar to the screen below Ch
51. ange Resistance measurement range Temperature measurement range Display resolution Accuracy ratio 20 C 5 C Accuracy resistance 20 C 5 C Accuracy temperature 20 C 5 C Sense current Sense current multipliers User selectable measurement display Internal reference resistors Internal reference resistors thermal stability Internal reference resistors accuracy Input channels Input connection Interfaces optional Expansion port optional 11 2 Display Vacuum Fluorescent Display VFD ITS90 Din90 BS EN60751 1996 IEC60751 1983 CvD BSEN1904 1984 IEC751 1983 0 to 4 999999 0 to 500 ohm ITS90 200 to 962 C Din90 200 to 850 C CvD 150 to 850 C lppm 0 1 mK 2ppm 0 2MQ 0 5mK at 273K 2 5mK full range 10uA 201A 100A 200uA IMA 2mA 10 mA 0 5 and v2 Ratio C F K or ohms 259 1000 0 5ppm C 0 01 uncalibrated 1 PRT 1 reference resistor 4 x BNC shield IEEE RS232C 1 x SB148 256 x 128 adjustable brightness 30 Measurements do not include uncertainties to the sensor 31 Using 100Q 1mA current x4 gain external reference medium adaptive filter and a 2 second update rate Page 115 ASL 2009 F600AC 14 001 2 9 F600AC User Manual 11 3 Analogue outputs Output 1 Output 2 11 4 Power supply Mains charger supply voltage range Power consumption Supply frequency range Fuse 11 5 Environmental Storage temperature range
52. channels AOUT setting 9 4 12 CONFigure REFerence lt source gt lt channel gt Command Returns Parameters Function Example CONMF REF source channel CONFIGURE REFERENCE source channel None channel 0 to 99 single channel measurement source INT Internal EXT External Sets the channel to use this reference type Aborts the current measurement cycle Clears the last measurement from the display Clears the output buffer COMF REF lt space gt INT 01 lt cr gt sets the selected channel s reference to internal 01 standard 9 4 13 CONFigure REFerence Command Returns Function Example CONF REF CONFIGURE REFERENCE lt source gt lt channel gt Returns the active channel s reference setting CONF REF lt cr gt command Ol lt cr gt lt lf gt response returns the reference for the active channel as Internal ChO1 9 4 14 CONFigure MODE lt mode gt lt test gt Page 93 ASL 2009 F600AC 14 001 2 9 F600AC User Manual Command Returns Parameters Function Example ASL CONF MODE mode test CONFIGURE MODE channel test None F600 AC mode 0 Place instrument in manual balance Place instrument in auto balance lt test gt 0 Place instrument in normal measurement mode Place instrument in unity test mode 2 Place instrument in zero test mode Selects the specified instrument measurement mode Aborts the current measurement cycle Clears t
53. connection type PB WR cr command EO0 Unrecognised command E01 Command is not part of PB series ASL 2009 F600AC 14 001 2 9 F600AC User Manual Notes 9 4 33 PB CV lt n gt Command Returns Parameters Function Example Errors Notes 9 4 34 PB CV Command Returns Parameters Function Example Errors Page 102 ASL Reserved for future use Currently only 4 wire connection is supported PB CV n None Probe type n 0 DIN 1 CvD 2 ITS90 Sets the probe temperature conversion type PB CV 2 cr command E00 Unrecognised command E01 Command is not part of PB series EO2 Probe ID not valid E03 Missing parameter i e n E04 n parameter value is not valid Parameter must be one of the above PB CV Probe temperature conversion type None Returns the probe temperature conversion type see above PB CV cr lt 2 gt lt cr gt lt f gt command response EO0 Unrecognised command E01 Command is not part of PB series ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Page 103 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 9 4 35 PB CF lt m gt lt n nnnnnE ee gt Command Returns Parameters Function Example Errors Notes 9 4 36 PB CFn Command Returns Parameters Function Page 104 PB CF m n nnnnnE ee None Probe conversion value Sets the probe temperature conversion parameter
54. corded on the test certificate that comes with the instrument Page 67 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL The editing process is identical to the one used in section 5 3 4 Edit the current field and note that the nominal field will automatically be adjusted to follow it 3 significant digits shown Press the OK key once you are happy with the new value Edit the remaining values as required before pressing the Exit soft key The screen for example will change to show 441 Internal Resistors Batch No 000000 Serial No 000 Rs 00 25 Rs 01 100 001 Save Clear Menu Back LJLI LI LJ Press the Save soft key to keep the changes or press the Back or Clear soft key to prevent any changes from being applied Press the Menu key to end editing or the Back key to return to the previous menu The nominal internal resistors values fitted as standard are 25 ohms and 100 ohms Note The calibration values are held in non volatile memory inside the F600 The instrument MUST be switched off and on again for the new calibration values to take effect Page 68 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 3 11 Calibration Factory Defaults menu This menu clears the factory default settings for the internal resistors and probes and also for The external references Note Use this menu with care ALL values entered into the F600 will be cleared Press the 4 k
55. cr gt lt lf gt response ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 9 4 4 CONFigure CURRent lt multi gt lt base gt Command CONF CURR multiplier base CONFIGURE CURRENT lt multiplier base Returns None Parameters lt multiplier gt O Multiply by Multiply by 2 Multiply by v2 lt base gt 0 Current set to Current set to 2 Current set to 100uA 3 Current set to 200uA 4 Current set to 500uA 5 Current set to 1 0mA 6 Current set to 2 0mA 7 Current set to 5 0mA 8 Current set to 10mA Function Selects the specified current without initiating a measurement Aborts the current measurement cycle Clears the last measurement from the display Clears the output buffer Example CONF CURR lt space gt 3 2 lt cr gt sets the active channel s current to v2 x 100uA 9 4 5 CONFigure CURRent Command CONF CURR CONFIGURE CURRENT Returns lt multiplier base formatted to 2 significant digits Function Returns the active channel s current setting Example CONF CURR cr command 03 02 lt cr gt lt lf gt response returns the active channel s setting of v 2 x 100uA 9 4 6 CONFigure GAIN lt multiplier gt lt base gt Command CONF GAIN lt multiplier gt lt base gt CONFIGURE GAIN lt multiplier gt lt base gt Page 90 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Returns None Parameters lt multiplier gt 0 Multiply by Multiply by 2 Multiply by 3 Multiply
56. d by drift 35 The frequency is automatically adjusted to 30Hz when the mains power supply runs at 60Hz this eliminates mains interference since the generated sine wave is locked to the mains supply frequency Page 127 ASL 2009 F600AC 14 001 2 9 F600AC User Manual Index A Abreviations CVD sinus 123 PRI rene 2 PETOQ ut citt orbata 2 RID SR ne 2 AC Bridge basics 127 ACCessories ess 113 Analogue outputs 14 71 B ie euer 3 Balance Meter 27 Balance modes 26 AUTOMATIC ccc 27 Manual ee 28 ln ur EE 30 om 30 C Calibration 66 79 Channel edit menu 59 Channel review menu 58 Cleaning ccn 118 Clock men 63 64 Communications 83 Conversion algorithms eup 123 DIN P 126 MZ 124 CVD siis 5 77 115 123 D Definitions AIDING PRE EU 2 milli degree C 2 milli degree F 2 Milli KEIVIN rn 2 DIL sta 5 51 123 126 Disposal information Xii E Earth connector 14 Expansion ports 14 Page 128 F e hrs Firmware update 121 Front panel 7 Function keys NDS EE tives 37 Auto Man nne 26 CRAN sant 10 40 Channel selection 41 Complement check 45 ej M 10 35 DISD scr 10 22 23 48 FINS cec 10 32 gin Le 45 ESO AT TE 10 33 BOLE 10 38 Probe anna 44 Rs42 Self heating
57. e the keys to operate the instrument Page 8 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Page 9 Disp Chan Zero Hold Curr Gain Filter Units Func Probe 0 1 X2 Auto Man Rs 4 Back Menu Figure 3 3 keypad detail Exp The keypad is used to select the various menu options and to set the operating modes The commonly used keys are collected together in the top row The functions under the top row of keys are accessed by pressing the mode key first and then the desired function key4 The numeric keypad used to enter numerical values and may also be used to select sub menu options when these are shown on the screen The Menu key is used to select the remainder of the less frequently used options The circular buttons are used to navigate through the menus The Back key is used to return to the previous menu level without changing values A summary of the keys and their function is shown on the next page in table 3 1 4 Press the Mode key twice to return to normal unshifted key operation ASL 2009 F600AC 14 001 2 9 F600AC User Manual Key symbol Disp Chan Zero Hold Curr Gain Filter Units Shift Mode Key symbol Auto Man Rs Page 10 Instrument functions keys Description Select display type Select Input Channel Zero display measurement Hold display measurement Select operating current Select instrument gain Select filter value Select display units
58. eeecesssscssecesseecassecsasesesaeceeesecsseeeses 96 9 4 20 MEAGure tat 96 E EE 97 9 4 22 UNIT TEMPerature um 97 9 4 23 UNIT TEMPerature esses esee eene nnn nnne tnn nnne rnnt eser tense arent nnns 98 9 4 24 MEAS READALL or READALL eese sees seen eene nnne tnn enr eaae nhan tnn 98 P 2D PRADA E 98 9426 BPBID iei green onis aedium tere piace iners 99 P PEN ir dali M 99 P DJ PBI lt P gt SOME E 100 9 4 29 PB NM oss 100 9430 IU 100 DST IUE EIER 101 932 PB MV ean cee eieiei LM TEE LM 101 P Foo MM EE K BAVAS EE 102 IAA M 102 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 94 35 PB CF m n nnnnnE ee d 104 E EE e KEEN 104 PAST CHAD SINE ER 105 IAG CHID Pm 105 Q439 CATV E M H 106 94 40 CERISE IMA N iais re tieni an rd narra REA AAA EAE AEAEE na EAA 106 E E NEQU HIC Momm 107 94 42 CHRT li Gg U amm PP rennes 108 Q443 I 110 9444 CHAIRS nro see er natora saa huma ea d n ne ta ent se rh a da RR A LER Lun a EFL Gun a ada Qaa Ea 110 9 445 CH RS eps ef 110 94 46 XCH RS E nunnnnnnEs ees uoi Liste ssl en es ra EHE ERR esse SR MdL AER Rae Ee a AREE ARR odd 112 92427 CHREAN us tee eh eed tu p e E Ced ER Eee Doa Pao teda luda 112 10 OPTIONS AND ACCESSORIES 2 2 22r iae ee cce inn ac creen
59. enseneeeenseneeeenseneeeenseeeeenseeeeeseseeeenenseeeanes 127 18 1 AC Bridge e LE 127 INDEX en nn en EE 128 Page vi O ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Conventions used in this manual Structure of manual The manual is divided into sections Each section deals with a specific topic or related topics Sections are displayed in a regular bold typeface for example 1 0 Introduction Sections are sub divided into sub headings for example 7 1 Feafures These may also be subdivided Terminology The terms F600AC Precision Bridge AC Bridge F600 F600AC precision bridge bridge and instrument are used interchangeably in this manual Warnings and Notices These appear in the body of the text clearly displayed with a box surrounding the text The first word within the box displays the type Warning or Note A Warning double box is designed to draw attention to an aspect that may cause danger to the user or damage to the instrument A Note single box is used to bring special attention to something important requiring action or avoidance Copyright 2009 ASL is a division of Hartest Precision Instruments Ltd All rights reserved Information in this document is subject to change without notice Reproduction or modification of the whole or any part of this document in any form without ASL s written permission is forbidden except for internal use by an auth
60. ensor body than the current drive connections Page 18 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual ImA current High value sensors must be operated with a lower current setting The R resistor value is limited to 5 times the Rs resistor value Conversely low value resistors below 10 ohms may develop too small a voltage to give an adequate signal to noise ratio and a higher current settings may be required Inevitably for a given resistor higher currents lead to higher self heating effects The V2 current multiplier will cause a doubling of the power developed across each resistor and can be used with the other current settings to estimate the effect of self heating on the sensor or resistor being measured Page 19 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 Operating the F600 5 Instrument operating modes The instrument has two operating modes e Measurement Mode which displays the measurement and the instrument status e Menu Mode which allows selection of operating conditions and its settings 5 1 1 Measurement mode normal In Measurement Mode the screen displays the current reading and its units ratio resistance or temperature reference resistor value and type the current channel and probe selected and the instrument s gain statistics and the time of day are also shown This is the normal operating display for the F600 The display will look similar to the one shown below
61. enu and press the OK key to access this menu Use the navigation key to move to the Analogue 1 output menu as shown below 4 System 1 Information dou ES F3 ES 4 Calibration 5 Analogue 1 OK 6 Presets Menu Back Press the 5 key or the OK key to see the current values 45 Analogue Type O P Measurement Channel 00 Scale 10 00 Units V A Limit High 10 00 Volts Low 10 00 Volts OK Zero 1 v Edit l Menu Back LI LJ Press the Edit soft key to alter the analogue output values The screen will change to show Page 71 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 45 Analogue _L Current edit field Type O P Measurement A OK p gt v Menu Back LJ L1 The display has changed to show the and brackets around the current edit field the measurement type in this case The lt and BR navigation keys are used to move the active edit field Move to the field that you want to change and press OK The lt and BR keys will change to moving the cursor within the field The numeric keypad may be used to change numeric field values Editing is similar to the Probe Edit screen see section 5 3 4 Use the A and Y navigation keys to change the Measurement field Type O P This field toggles between Measurement and Balance as the output value Either the output is based on the current unit Measurement Output V Measurement Zero Scale or the balance err
62. ettings 29 The SYSTEM REMOTE command is cancelled once the instrument s power is switched off and on again Page 88 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 9 4 USB IEEE RS232 interface commands 9 4 1 SYSTem REMote All F600 commands are described in detail in the follow sections Each command description follows a common layout Command SYSTEM REMOTE Returns Function Example 9 4 2 SYSTem LOCal Command Returns Function Example 9 4 3 IDN Page 89 Command Returns Parameters Function Example SYST REM None Places the instrument in remote mode for interface control Displays Remote on the F600 Aborts the current measurement cycle Clears the last reading from the display Clears the output buffer Locks out the instrument s front panel keys SYST REM SYST LOC SYSTEM LOCAL None Returns the instrument to local mode Removes Remote from the instrument display Enables the instrument s front panel keys SYST LOC IDN manufacturer model no gt lt serial no firmware version manufacture ASL model no F600AC serial no Serial number of the instrument firmware version Current firmware version and date Reads the instrument s identification code consisting of the manufacturer name instrument model number instrument serial number firmware version and date IDN lt cr gt command ASL F600AC 00001003 1V0 30March2007 lt
63. ey or the OK key to see the calibration menu 44 Calibration 1 Internal Resistors 2 Set Factory Defaults OK Menu Back LJ L1 Press the 2 key or use the navigation keys and press the OK key to select the Set Factory Defaults menu 442 Set Factory Defaults OK To Exit Press Menu again Rt amp Probes Menu Back L L LJ L Page 69 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Either press the Rt amp Probes soft key or the Rs soft key For example pressing the Rt key will show 442 Set Factory Defaults To confirm overwrite of the Rs Calibration Press OK key Any other key to abort OK To Exit Press Menu again Rt amp Probes Menu Back LJ LJ EJ CI Either press the OK or any other key to prevent overwriting If the OK key is pressed then the following screen will be seen after a few seconds 442 Set Factory Defaults To confirm overwrite of the Rs Calibration Press OK key Any other key to abort Writing Complete OK To Exit Press Menu again Rt amp Probes Menu Back LJ LJ LI L Press the Menu to exit or press the Cancel key to return to the previous menu Page 70 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 3 12 Analogue output menu This menu is used to set the analogue output scaling and offset values for the F600 Bridge Press the 4 key on the numeric pad and use the up and down keys to navigate to the System M
64. from cold when using the internal reference resistors Y Dokeep the operating environment stable Y Do ensure the sensor leads and input connectors are free from dirt as leakage current will affect the results v Do ensure that you use an external regularly calibrated reference resistance for your most accurate measurements2s v n common with best practice use a known stable calibrated resistor to take a measurement at the start and end of the day log the results v Set the maximum current that your probe will stand without self heating becoming an issue x DoNOTIocate the instrument near a source of vibration heat or draughts x Do NOT locate the instrument near sources of electrical interference e g electric motors 23 The F600AC Bridge contains high quality and stable internal reference resistors however these are only specified to an accuracy of 0 01 with a thermal stability 0 5 ppm C Page 81 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL This page is intentionally left blank Page 82 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 9 Communications Interface and PC commands 9 Introduction The F600 is fitted with a USB communication interface as standard The connected PC must have the correct USB driver installed to use the interface see section 9 2 Alternatively the F600 may be fitted with an RS232 or IEEE interface The commands are buffered by the F600 saved
65. ge The BR key will move it back to the right hand column 16 The gain will be adjusted by the instrument when Automatic balance mode is selected Page 33 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Set Gain i The Bridge s gain may be set to 10 20 100 200 1000 2000 10000 20000 100000 200000 1000000 2000000 Page 34 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 2 5 Curr ent function key Press the Curr function key to show the current selection menu Select the current setting you require using the soft key the A W navigation keys or the numerical keypad the change to the current value is implemented immediately Press the OK key the Cur key or the Back key to return to normal measurement mode Use the 4 gt keys to move the navigation key selection between the two columns Note The current menu is slightly different to other menus since changing the setting on this screen does not immediately change its value This is because for example scrolling down from IMA through 10mA and back to 10uA may unacceptably increase self heating Two current tables are available and may be used in any combination So in the case shown below a total current of 2mA is selected 1 x 2mA Pressing 1 and 7 would give a new setting of 5mA 1 x 5mA Use as high a current as possible for your measurement remembering that if the current is set too high self heating effects in the
66. he output buffer CONF MODE space 1 O cr puts the instrument into the normal mode of operation 9 4 15 CONFigure MODE Command Returns Function Example CONF MODE CONFIGURE MODE mode test cr Select the specified instrument measurement mode CONF MODE space 1 O cr Put instrument into auto with no test mode i e normal operation CONF MODE lt cr gt commana 0 0 lt cr gt lt lf gt response returns with the instrument s setting of manual amp manual 9 4 16 CONFigure MSET lt X XXXXXX gt lt U gt Firmware version V2 6 onwards Command Returns Parameter Page 94 CONF MSET lt X XXXXXX gt lt U gt None X XXXXXX Numerical ratio to apply to the bridge U Units currently only W supported ASL 2009 F600AC 14 001 2 9 ASL Function Example Errors F600AC User Manual Set the ratio of the bridge in both Manual and Automatic mode in Automatic mode this ratio will exist briefly until automatic balance takes over CONF MSET 0 345500 W lt cr gt Command E03 Incorrect parameter or invalid ratio 9 4 17 CONFigure MSET Firmware version V2 6 onwards Command Returns Function Example Errors CONF MSET X XXXXXX U lt cr gt Formatted balance value where U is the unit The current Manual bridge balance setting or the current Automatic balance value CONF MSET lt cr gt command 1 002340 W lt cr gt response E03 Ratio
67. her Warning Probes may be immersed in various chemicals during use Some of these chemicals may be dangerous or harmful even when the probe is cola Always assume that the probe has been used this way and DO NOT touch the probe without suitable protective clothing Warning DO NOT allow the probe to touch any external voltages such as MAINS power Page xi O ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Important disposal information If you are responsible for disposal then please note that this product may contain materials that are regulated in their disposal due to environmental considerations The presence of these materials is consistent with global regulations applicable at the time this product was placed on the market European Union This symbol means that the product to be disposed of should not be mixed with commercial or general FEN household waste Used products must be treated separately in accordance with legislation that requires the proper treatment recovery and recycling of the product If you wish to discard the product then please contact your dealer supplier or representative who will advise the correct procedure for disposal Disposing of the product correctly will help to save valuable resources and prevent environmental damage Outside the European Union The symbol only applies within the European Union If you need to discard the product then please contact
68. ier to use the API commands provided by FIDI See their web site for more details http www ftdichip com 9 2 2 IEEE 488 2 interface optional The IEEE 488 2 interface 5 requires the instrument s bus address to correspond to the address used by the controller normally a PC The IEEE interface uses an 8 bit data bus and software protocol to transfer data in parallel Each instrument connected to the bus must have an unique address This address may be changed at any time using the Instrument Preset screen The F600 slave bus address has a default address of 6 The software driver for the IEEE interface will be supplied by the PC interface card s vendor A popular text based console program is supplied by National Instruments and an example of the use of this is shown below Win32 Interactive Control Copyright 1996 National Instruments Corporation All rights reserved Type help for help or oO to quit 24 Replace the D with the name of your CD device as necessary 5 Also known as a GPIB interface Page 84 ASL 2009 F600AC 14 001 2 9 ASL ibdev enter board index 0 enter primary address 6 enter secondary address 0 enter timeout 13 enter EOI on last byte flag 1 enter end of string mode byte 10 uc ibwrt CONF GAIN x0D 0900 ras cmpl count 11 udo ibrd enter byte count 6 0900 ras cmpl count 6 30 33 2c 30 31 Od 03 01 9 2 3 RS232 interface optional
69. ing temperature standards and in the measurement of thermodynamic temperature The ITS 90 scale has much improved continuity precision and reproducibility compared with IPTS68 The implementation of the ITS 90 scale according to its definition calls for significant changes in equipment and procedure compared with IPTS68 but lower uncertainties of calibration are achievable in all parts of the range However the instruments and equipment needed to implement the ITS 90 scale in calibration laboratories will be substantially the same Particular features are ITS 90 specifies the use of the PRT up to the freezing point of silver 961 78 C The platinum 10 rhodium platinum thermocouple is no longer specified for use in the scale though it and other noble metal thermocouples will continue to be used as secondary standards e New more precise fixed points have been introduced and mathematical procedures for calculating resistance temperature equivalents have been revised so as to reduce the non uniqueness of the scale that is to reduce the differences which occur between different identically calibrated PRTs In particular the calibration of a PRT can no longer be extrapolated beyond the freezing point of zinc 419 527 C but requires a measurement at the freezing point of aluminium 660 323 C e Alternative definitions are permitted in certain sub ranges so that the calibration of a PRT can be terminated at almost any fixed point
70. is process the settling time will be determined by the currently set filter The usual reasons the bridge cannot balance are due to overload conditions reduce the current and or gain to reduce the overload condition Alternatively the R Rs ratio may exceed the 4 99999 limit of the bridge in this case increase the reference resistor value Note that the bridge may display error conditions during the initial balance phase This is normal while the system changes gains to reach a balance The error conditions will disappear as the bridge approaches the balance position 5 2 1 2 Automatic balance meter The meter indicator will change to a diamond symbol when the meter is balanced The meter scale is logarithmic 1 The bridge s gain is automatically increased by the bridge as the balance point is approached Page 27 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 1 3 Manual balance The bridge may be balanced manually when the in ratio mode This is not normally necessary it is usually impossible to better automatic balance unless the input signal is very noisy 1 000300 OK v Back Select Manual mode using the soft key Once manual mode is selected a cursor will appear under the currently active digit 3 in the example above Use the A up and W down keys to change the value of the active digit and use the left and BR right keys to select the adjacent digit Alternatively the digits may be entered f
71. l it is turned off or the mode is changed Page 39 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 9 Chan function key Press the Chan function key to show the channel selection menu Highlighted Channel Ch00 PbOO 100R i A list of active channels will be shown Use the A W navigation keys to scroll the highlighted line up or down the list up to three lines are displayed on the screen due to space limitations Press the OK key to select the highlighted channel or press the Chan key to select the highlighted line and return to measurement Alternatively press the Back key to return without altering the channel Note Note that the OK key immediately selects the highlighted line but does not return to normal measurement display allowing you to individually view and select other channels For reference the probe attached to this channel the reference resistor and the current are also shown these may be changed via the Rs Probe and Cur function keys respectively Page 40 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 2 9 1 Channel selection Up to 99 channels can be stored and edited channel 0 is the default instrument channel Note External channel numbering is only important when the F600 is used with a switch box otherwise external channel numbering can be set as required Each channel contains a set of instrumental conditions channels can be used to quickly
72. lement Check eienieeeeon eese tacet a nna e enhn dena Deua keel eg Que nada De 45 5 2 12 2 Self heating ee EE 47 0 2 13 DISO TUNCTON cj 48 5 3 Mila 49 ege E WEE e oom 49 id 2 e EE seit Diem PET 50 5 3 3 Probe Review menu 51 ONT ME rel rg an EE 53 5 3 5 Channels Review rien eiki det sien sha den apad ERANA 58 9 36 Channels EdD MENU PES 59 e E EE ee EE 62 5 3 8 ee gi 63 0 39 CIOCK e TE 64 5 3 10 Calibration Internal Rs men 66 5 3 11 Calibration Factory Defaults men 69 5 8 12 Analogue output men 71 03 13 en 74 6 INSTRUMENT MEASUREMENT RANGE 0csccecssseceseeeesseeeesaeeeseeeenseeessaeeeseansnseeeenseeessanseseanenseeenss 77 6 1 Instrument measurement working range sise 77 6 2 Me suremeMt INGOS PEE 77 7 CALIBRATING THE E 79 Zi F60O0AC Instrument COMPOTION ss HER 79 7 2 zo S eia E 79 7 3 e lee eege e EE 79 Page iv ASL 2009 F600AC 14 001 2 9 ASL 8 Page v F600AC User Manual OBTAINING THE BEST FROM THE F600AC BRIDGE ii ninrrennmnnnnes 81 8 1 tele e c esse 81 COMMUNICATIONS INTERFACE AND PC COMMANDS cese nunne nunne nnmnnn na 83 9 atelier EE 83 9 2 Ini uere 83 SS MENU Ee E 83 9 2 2 IEEE 488 2 interface option 84 9 2 3 R623Z interface ODTIODnOD ss EE 85 9 3 Humen PO COETmneards s accurrit e arr
73. llow to thermally stabilise the first time before switching on particularly if the instrument is cold e Connect a 100 ohm resistor any type will do to the Rt terminals as described in section 4 Switch on and start measuring the ratio without changing any of the settings Change one setting at a time to familiarise yourself with each of the menus Start with the alternative display functions described in section 5 1 Next use the Units menu and try changing to C K and ohms Check that the bridge is operating correctly by changing the balance mode to unity then to zero and then back to normal balance mode section 5 1 Follow this by systematically changing the other instrument settings Remember to reset each change until you are familiar with the F600 3 As supplied the F600 will be set for this measurement using the internal 100 ohm reference resistor Page 6 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 3 About the F600AC Precision Bridge This section introduces the features and functions of the F600AC Precision Thermometry Bridge Each of the F600 Bridge s features is explained in turn Once the F600 has been set to your particular requirements all the commonly used functions are available using single key strokes 3 1 The front panel The front panel is shown below figure 3 1 with the various controls and connections Reference channel Rs VFD display Navigation keys
74. low This is a shortcut to the function available on the Curr menu but unlike the Curr menu it s effect is immediate without the need to confirm the change Page 37 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 7 Hold function key The Hold function key does not have a menu associated with it Press the Hold key to freeze the value shown on the display this is indicated by the letter H on the top line see below Measurements continue even if the display is frozen Display frozen Press the Hold key to un freeze the display Page 38 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 2 8 Zero function key The Zero function is useful when looking for changes The current reading is held and then subtracted from subsequent readings The function key does not have a menu associated with it Press the Zero key to zero the value shown on the display This is indicated by the letter Z on the top line see below Display in zero mode relative Mean 410 3520 Diff No 0 00002 12 Max 10 3521 Min 10 2319 Std Dev 0 0001 The zero function can be used with any of the instrument s temperature units it will not work when ratio or resistance is selected Note A warning message will appear if the zero function key is pressed when temperature mode is not selected Zero mode can be turned off by pressing the Zero key again Note Zero mode will remain active unti
75. m can hold CH ID nn cr None Returns the currently selected edittable probe channel CH ID lt cr gt command 17 lt cr gt lt lf gt response EO0 Unrecognised command ASL 2009 F600AC 14 001 2 9 F600AC User Manual Notes 9 4 39 CH TY Command Returns Parameters Function Example Errors ASL E01 Command is not part of CH series Channel 00 is not edittable There is a limit of 100 channels that the system can hold CH TY None or n lt cr gt None Returns Channel type either Rt or Rs for the selected channel 0 Rt Normal channel 1 Rs External reference resistor channel CH TY lt cr gt command l lt cr gt lt lf gt response lt cr gt lt lf gt response if channel not present or valid E00 Unrecognised command E01 Command is not part of CH series 9 4 40 CH RT lt nn gt lt mm gt Command Returns Parameters Function Example Errors CH RT nn mm None nn mm Add channel channel 0 setting are copied nn mm for security 0 Rt Normal channel added Rs External reference resistor channel added CH RT 13 13 cr command E00 Unrecognised command E01 Command is not part of CH series E02 Missing parameter i e nn mm E03 nn exceed allowable probe limit or nn is not equal to mm E04 Channel nn already exists Note Channel 00 is not edittable There is a limit of 100 channels the system ASL 2009 F600AC 14
76. navigate to the Channel Menu and press the OK key to access this menu 3 Channels 24 24 1 Review 2 Edit A OK v Menu Back LJ LJ Press the 2 key or the W navigation and OK key to Edit the channel information 32 Channel Edit gu AM ake A S OK v Prev l Edit Delete l Next Menu Back LILILJLI LI LJ Information only fields Page 59 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL The first two fields are for information only they cannot be edited Use the Prev and Next soft keys to move through the pages for all 99 channels Channels that have been entered will look similar to the example above Unused channels will look similar to the one below 32 Channel Edit CH 12 Type N A kkkkkkkkkkkkk kkkkkkkkkkkkkkk empty Prev New Rt l New Rs Next Menu Back EJ CJ CI Oo LJ LI Empty channels may be used For example press the New Rt soft key to see the screen below 32 Channel Edit Unsaved CH 00 Type Rt Ic 10 Gain x0 4 Ref INT 100R 100 0001 Probe Pb01 DIN def00 o Save Cancel Select Save or Cancel as required If Cancel is selected the screen will change back to the previous one allowing you to select another channel for editing 20 Alternatively type in the channel number using the numeric keypad Page 60 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual A new channel may be edited once it has been saved
77. nnnennnes XII 1 INT RODUG TION E 1 UN OVEIMIGW 1 1 2 Definitions and terminology sise 2 1 3 Principles of measurement sise 2 1 4 elle Inter Le e CN 3 2 SETTING UP THE zc Us Md 5 2 1 Saleh Momma ON TRE D D mL ELEME 5 2 2 Unpacking he ierg 5 2 3 Setting up temperature measurement iii 5 2 4 eiuiuekjeiem c 6 3 ABOUT THE F600AC PRECISION BRIDGE rnrrrrrsnemmnrennnmmneennmeneennmeneennmnnennns 7 3 1 Th TON panels P 7 3 2 About the VFO display sero aiurria EEE N Ea aE EEE NA EE aE 8 3 3 LED INACTION f san 8 Xd POWEF LED sta ati e aii e i LR EC RR X B La a CLR ERE RR XR RE ER dele 8 BZ Standby EE 8 3 4 TING elo Re E am tend 8 3 5 PUT COMMSCTOMS HET EE 12 3 6 Red panel 13 3 6 1 Name plate and serial number E A AAAA EAR 13 3 62 Electrical rating plate seems 13 3 0 9 MOINS IN DUT anee 13 30 4 Expansionm DOMES bee ie tien dde dea Fa a d die n ce aient Pere d d e a nu a 14 369 Analogue rte TC 14 3 6 6 USB Communication interface connector sise 14 3 6 7 EQUA e eeler 14 4 SENSOR AND REFERENCE RESISTOR CONNECTIONS eseeeee essere eese e enne enne nnn nnns 16 AT CONNECT
78. obes possible E10 PP 5th parameter Probe number does not exist Notes The parameters used combined value in some case Example CH RT 25 31 C J001 03 cr command Set Icc 1 4mA gain 20 celcius internal Rs ChOT probe 03 U Units U Units Ww Ratio R Ohms C Celcuis F Fahrenheit K Kelvin amm Reference channel a mm Type Internal E 01 to 99 External Channel number Page 108 ASL 2009 F600AC 14 001 2 9 ASL li combined current value Parameter multiply x 1 multiply x 0 5 multiply x 2 JOUA 20UA 100uA 200uA 500uA 1 0mA 2 0mA 5 0mA 10 0mA Gg Gain combined Page 109 Parameter x 0 4 x 0 8 x 1 0 x 2 0 1x10 1x10 1x102 1x108 1x104 1x105 1x106 1x107 ST C Gy BR C N ASL 2009 F600AC User Manual ned ident see table below F600AC 14 001 2 9 F600AC User Manual 9 4 43 CH RT Command Returns Parameters Function Errors Example ASL CH RT Channel settings for currently selected channel None Returns the Rt channel setting based on the tables see table in the previous command EO0 Unrecognised command E02 Command is not part of CH series E03 Channel is not Rt CH RT cr command CH RT 25 3
79. oefficients must be measured individually by regression for a particular PRT when greater accuracy is required An alternative and easier method exists via the Callendar van Dusen CvD equation based on measurement of four accurately known temperatures The F600 allows these coefficients to be entered for each probe used The resistance to temperature conversion calculation is then carried out automatically within the instrument However this does rely on the user knowing the coefficients A B and C accurately and entering these into the F600 It is worth noting that the coefficients vary between standards Typical values PRT dependent are Standard A B o 0 003850 3 9080 x 10 5 8019 x 107 4 2735 x 10 0 003911 3 9692 x 103 5 8495 x 107 4 2325 x 10 12 0 003926 3 9848 x 103 5 870 x 107 4 0000 x 10 172 C 0ift gt 0 C Page 123 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 16 Appendix 3 ITS 90 16 1 International Temperature Scale ITS 90 The purpose of this scale is to define procedures by which certain specified practical PRTs of the required quality can be calibrated in such a way that the values of temperature obtained from them can be precise and reproducible at the same time matching the corresponding thermodynamic values as closely as current technology permits Since 1968 when the IPTS68 was adopted there have been significant advances in the techniques employed in establish
80. ol Function Shift ME HM Exponent key Used for numerical data entry with the Shift key Plus key Used for numerical data entry with the Shift key Table 3 1 summary of front panel key functions Press the Shift key once and the shift key assignments will be displayed shown below Select the required function key or press the Shift key once more to clear the display 12 02 03 I I mm 1 000004 5H Disp Chan Zero Hold Curr Gain Unit Func Probe 0 1 Sqrt A M Rs Page 11 O ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 3 5 Input connectors The BNC input connectors are located to the left of the display The central connector is used when a screen connection is required The two right hand connections are only used when an external reference resistor is selected they are not required when one of the internal reference resistors is used The unknown resistance or probe is connected to the left hand BNCs Connections are described in detail in section 4 External reference resistor connection Unknown resistance to measure Screen connection shield Figure 3 4 input connections The inputs accept Passive probes Passive probes do not contain calibration information and the F600 must be set up with calibration information for each probe used unless the calibration calculations are done externally Up to 99 sets of probe information can be stored sim
81. onnectors enable a multiplexer purchased separately to be used to expand the number of input connections 3 6 5 Analogue outputs There are two analogue outputs Output 1 provides a scaled measurements voltage 10V Output 2 provides a balance error signal voltage 10V Output 1 may be used with a chart recorder The output can be scaled and offset to provide a voltage proportional to the current reading over the range of interest Output 2 may be used to control an external process the signal is proportional to the error between the R input of the external process and the Rs reference value 3 6 6 USB Communication interface connector The USB connector is fitted as standard see figure 3 4 Communication requires the installation of the USB driver on a PC See the separate information supplied on the CD A standard USB cable is supplied with the instrument The instrument can be controlled through simple ASCII commands see later section and can transmit ASCII result data which may be recorded using a simple terminal program or using ASL s ULOG 3 6 7 Earth connector The earth connector on the rear of instrument is joined to the instrument s chassis and may be conveniently used to connect to other equipment particularly if the instrument is rack mounted 5 Units are selectable Page 14 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual This page is intentionally left blank Page 15 ASL 2009 F6
82. or signal is output for the F600AC Bridge Output V Balance Error Channel Selects channel for which to set the analogue parameters to 0 to 99 Scale Scale factor for the selected channel in units volt 1000 to 0 01 Limit High Sets the maximum output in volts for the selected channel 10 0 to 10 0V Limit Low Sets the minimum output in volts for the selected channel 10 0 to 10 0V Zero Sets the offset value from OV for the selected channel real or exponential number Note that the values of Zero and Scale are unit less and will apply to the active channel s units Page 72 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual For example to set channel 19 to give 5V full scale output based around 1V i e a full scale output between 6V and 4V set the valiues to Type O P Measurement Channel 19 Scale 0 5 Limit High 6V Limit Low 4V Zero 1V Once you are happy with all the field entries press the Menu key to accept the value and return to measurement mode or press the Back key to return to the previous menu Page 73 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 3 13 Presets menu This menu is used to set the Baud rate to 9600 19200 or 38400 The menu is also used to set the address for the optional IEEE interface when fitted Press the 4 key on the numeric pad and use the up and down keys to navigate to the System Menu and press the OK key to access this menu
83. orised dealer or agent Customers may make copies for internal use only Whilst efforts have been made to ensure the accuracy of information presented here ASL can assume no responsibility for the accuracy of any information presented or the consequences of acting on this information ASL also disclaims any representation that the contents are current However ASL would be grateful for any comments on the layout accuracy or contents of this manual ASL shall not be liable for problems or damages arising from the use or misuse of items servicing equipment procedures or options supplied by other companies ASL 2 Gatton Business Park Wells Place Redhill Surrey RH1 3LG U K Tel 44 0 1737 649300 Fax 44 0 1737 649301 email info aslltd co uk Page vii ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Important safety information Read and understand the user instruction manual before attempting to use the instrument The F600AC is a precision AC bridge It must not be used for any other purpose Warning The protection provided by the instrument may be impaired if the equipment is not used in the manner specified Only replace items or components with an approved or equivalent spare part All spare and consumable parts are available from ASL Warning The instrument is NOT designed to be used in a potentially explosive atmosphere or medical environment x Do NOT clean the instrument with solven
84. pe The Insert key allows you to inset a digit and the Delete key to erase a digit The Space key inserts a blank digit The Overtype key changes the selected digit and the Backspace key moves one digit to the left with deletion if possible The Exp shift key is used to insert an exponent use the shift key to select this instead of the decimal place Page 56 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Press the OK key to accept and save the results of the edit Alternatively move the edit field up or down to leave the results unchanged Press the Exit soft key once all the probe data has been entered and then press the Save key to save the probe data Data entry is similar for the other temperature conversion methods Press the Menu or Back key once you have entered all the data Note Failure to accurately enter the correct probe type and its associated calibration data will lead to inaccurate or wrong resistance to temperature conversion calculations Note The numeric keypad may be used to move directly to a probe number This is easier thatn moving one probe at a time in some circumstances Page 57 ASL 2009 F600AC 14 001 2 9 F600AC User Manual 5 3 5 Channels Review menu ASL A channel holds a complete instrumental setup under its identification number This menu may be used to Review individual channel information Press the 1 key on the numeric pad or use the up and down keys
85. r Manual Note To perform a complement check accurate to 2 ppm the two resistors must be stable over the measurement period 5 2 12 2 Self heating check This test is useful to check probe self heating Scroll to the Probe Self Heating function and press the OK key The following screen will appear Self Heating Measure LJ Press the Measure soft key to start the process The probe will be measured with the set current to start and then with V2 current after 40 seconds when the following screen will appear Self Heating Std T 1 00100 Sqrt T 1 00099 dT 0 000011 Abort Page 47 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 13 Disp function key The Disp function key does not have a menu associated with it The key is used to change VFD display modes Three display modes available e Normal measurement mode display e Graphical display e Standby VFD blanked Press the Disp key once to move between each of these modes see section 5 1 Note The VFD display will be blanked turned off in Standby mode The orange Standby LED will be on when the Bridge is in this mode Page 48 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 3 Menu key The Menu key is used to access all other aspects of the F600 These menus are used less frequently Press the Menu key to display the top level menu The A and W keys can be used to navigate through these menus
86. rau e ena aea nen rac an Ga Paca rea d nada nre daa sane 86 9 3 1 Remote mode local lockout ere 86 9 3 2 Programming command syntax eee 87 D333 COSC SCNSTIVITY E 87 9 3 4 Long form short form commands sise 87 9 3 5 Command terminators cr or lt Cr gt lt lf gt essen entente nnne nnns 88 9 3 6 Starting with PC Commande 88 9 4 USB IEEE RS232 interface commands issues 89 ER WE e HE 89 942 SYSIlemiiiOQGQGl uet De t chess a yi eren e sien Pe ee espera egets 89 M ME Ip MEE 89 9 4 4 CONFigure CURRent mutt Dose 90 945 QONEIgure CUBRRGnDf EE 90 9 4 6 CONFigure GAIN multiplier base seen 90 94 7 CONFigure GAIN voeecccesccccsscccescecsessecesseceseecsussecsssssessecssssecsassscssecesusecusesesasesesseceeeteceneeeses 91 9 4 8 CONEFigure FlLTer lier 91 949 QCONFIQUIG FILIO Jii tiet bens ted ERIS EAE eee REL ORARE boon da ab Gage aaaeaii 92 9 410 CONFigure AOUT lt type gt lt channel gt lt scale gt lt high gt lt low gt lt zero gt 92 odd CONGU SAQU etus ttes eU EMI 93 94 12 CONFigure REFerence lt source gt lt channel gt ses 93 94 13 e EE 93 94 14 CONFigure MODE modez legt 93 P MIO gie VI HVIOlD S RE 94 9 4 16 CONFigure MSET lt X XXXXXXS lU 94 DATE QONFIQUIG MSET i tir a ierra rated eee ence a ins in eo eee p ea d Po ex y pua kae 95 94 18 MEASure CHANnel channel rennes 95 94 19 MEASUre CHANNE ccsccccesccceessecesseccestecessecasseessecss
87. rent drive and should be connected to the resistors as shown A single braided outer conductor is driven from a low impedance source and effectively screens the returning current on the inner coaxial conductor The upper coaxial connectors in Figure 4 2 are the voltage sense lines and should be connected to the resistors as shown The inner conductor is connected to the low point and the outer to the high point of the resistor i e the screen connects to the voltage terminal on the same side of the four terminal resistor as the screen of the current drive cable This point is the driven high point of the resistor The inner conductor is connected to the low point of The resistor and is at the same end as the inner conductor from the current drive cable In this way the outer cable screens are driven and provide screening for the low side of the resistor and cable inner conductors Additional guarding is provided by the guard circuit This drives the tail of the bridge so that the common point of Rs and R is held at virtual ground potential This common point is the low point of each resistor Hence the high points are at opposite ends of the bridge and are each driven but with opposite polarity Although the low point of the resistors are held near earth potential by the guard amplifier this is not a true earth and electrical connection other than the two bridge cables should be avoided Where connections cannot be made Page 17 A
88. rm The short form version is indicated by upper case characters in subsequent sections Either form may be used The following are identical 27 The and gt symbols in the text are used to help with clarity they do not form part of the command sequence Page 87 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL SYSTem REMote long form SYST REM short form 9 3 5 Command terminators cr or lt cr gt lt lf gt All commands sent to the instrument must be terminated with a carriage return lt cr gt character The terminating character pair lt cr gt lt lf gt may also be used since the F600 ignores the If character for all types of interface Receipt and response of the IEEE interface to a message at the PC end depend on the exact PC IEEE settings Note The examples below assume that the IEEE interface is set to interpret the cr character sent from the F600 and output this as cr lIf For clarity the command descriptions below to the F600 do not use the If character Responses using the USB interface are shown 28 9 3 6 Starting with PC commands Experiment with the IDN commands when first starting and do not use the SYSTEM REMOTE command until you are happy with the instrument s operation Use each of the commandas in turn to confirm that they produce the response you expect from them 28 The exact response of the F600 IEEE interface will depend on the PC s
89. rocesses Bandwidth E L The effects of the Filter selection menu are shown in the table below Filtering Function 10 second bandwidth 2 second bandwidth Default 1 second bandwidth 0 5 second bandwidth 0 2 second bandwidth Page 32 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 2 4 Gain function key Press the Gain function key to show the gain menu This is only useful in Manual balance mode e Select the gain settings you require using the soft key the A W navigation keys or the numerical keypad the change to the current value is implemented immediately Press the OK key the Gain key or the Back key to return to normal measurement mode both right hand soft keys are used for this menu Use the 4 gt keys to move the navigation key selection between the two columns Two gain tables are available and may be used in any combination So in the example shown below a total gain of 100 is selected 1 x 100 Pressing 1 and 5 would give a total system gain of 20 000 Q x 10K Use as high a gain as possible to manually balance the bridge remembering that if the gain is set too high the system may not be able to cope with the full dynamic range and noise The gain used will also depend on the probe current setting Note that the instrument s balance point will not be optimised if the gain is set too low Set Gain Press the lt key to move the column selection to the left see next pa
90. rom the numeric keypad Use the Back key to reset the whole balance value to 0 and to select the left hand digit The logarithmic meter gives an indication of the error distance from balance at the active gain It will be necessary to increase or initially decrease the gain to reach a balance s In the example above the meter indicates that the balance value is slightly too low 4 the meter pointer is to the right of centre and consequently the ratio needs increasing Manual balanced is achieved by gradually changing the displayed ratio to converge on the best result minimum error on the meter at highest practical gain Manual balance procedure bridge in ratio mode 1 Select Automatic mode via the shift key and Auto Man and let the bridge balance automatically this will quickly get you near or at a balance point 13 The balance update rate is approximately 1 3 4 of the currently set filter 14 The bridge is close to balance at the currently active gain since the pointer is not at one end of the meter Page 28 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 2 Select Manual mode via the shift key and Auto Man and observe the meter pointer Decrease the selected digit if the pointer is to the left of centre or increase the value it the pointer is to the right 3 Move the pointer as close as possible to the centre of the meter with the selected digit Increase the gain as the balance point is approached s
91. s displayed on the screen The bridge is balanced when the indicator arrow is positioned exactly over the centre of the meter When balanced the indicator will change to a solid diamond shape The bridge input circuit includes two functional checks zero and unity indicated by the symbols es and 212 on the top line Current balance mode Balance meter Balance Auto Manual Il More LILILJ The special operating modes are useful to check that instrument is working correctly and to check that the bridge can be balanced with the active settings Page 26 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Current balance mode Manual or Automatic Special balance mode Unity 1 or Zero 0 Display area for overload indication IPreamp The bridge will start operating in the selected mode immediately one of the balance mode soft keys is pressed Operating modes are described below 5 2 1 1 Automatic balance normal mode This is the Normal operating mode The bridge will attempt to balance automatically using the settings for the currently selected channel There may be valid reasons why the bridge cannot balance and these will be indicated to the left of the balance mode symbol The display will show the decades change as balance is approached The update rate on all but the last attempt is the minimum length of time needed to settle after a change at the end of th
92. s mode to Standby mode Pressing it again will change the display back to normal Measurement mode 5 1 4 Measurement mode standby Disp function key Press the Disp key to change the display from graphical display mode to Standby mode see section 3 3 2 This mode saves power as the VFD display is blank Press the Disp key once more to return to normal measurement mode Page 23 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 2 Setting the instrument s operating conditions The most commonly used keys are grouped together at the top of the front panel into nine Specific Function keys These keys are used to select the instrument s operating mode Function key operations are generally independent of each other As an example press the Units key and the display will change to the following one Current option Set Units Figure 5 2 unit selection example There are four parts to the screen The function description shows the currently selected menu in this case Set Units The currently set selected value is shown in reverse video i e the current units the other options are displayed below Note The instrument continues to measure in menu mode Selecting one of the available options will change the instrument settings immediately with the exception of the current menu Four Soft keys are situated below the VFD There are three ways to change the current set value 11 Except in the
93. t key is used to show the current time and date time and date are frozen on entry so that they can be easily edited Press the Change soft key to alter the settings The display will change to show Page 64 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Current edit field TN v Menu Back L LJ L1 The display has changed to show the and brackets around the current edit field the time The lt and BR keys are used to move the cursor to the left or right edit the time and 17 43 40 press OK press the Back to exit without changing the time Use the numeric keypad to change the current edit field values The A and W keys swap between time and date fields Press the OK key once the entry within the currently selected field is correct this returns the action of the A and W keys to moving between fields The Space soft key clears the numbers in the current field 24 03 07 DA v Menu Back L LJ L1 Once you are happy with all the field entries press the Menu key to accept the value and return to measurement mode or press the Back key to return to the previous menu without setting the clock Page 65 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 5 3 10 Calibration Internal Rs menu This menu is used to set the calibrated values of the internal reference resistors and to reset the F600 to its factory default setting Press the 4 key on the n
94. tance over range E09 Resistance under range ASL 2009 F600AC 14 001 2 9 Page 96 ASL 9 4 21 MEASure FETCH Function Example Command Returns Parameters Function Example F600AC User Manual EIO Resistance does not compute to a real value Ell Reserved EI2 Probe error EI3 Invalid temperature calculation El4 Temperature above Limit E15 Temperature below Limit Returns the active channel s next measurement and settings MEAS READ cr command 0 999993 W B cr lIf response returns the balanced ratio of 0 999993 for the active channel MEAS FETCH MEASURE FETCH measurement units flag See MEASURE READ Returns the active channel s current measurement and settings with the currently selected units May be used to reread with different units UNIT TEMP lt space gt CEL lt cr gt command to set units to celcius MEAS FETCH cr command 203 456 C B lt cr gt lt lf gt response returns the balanced value of 203 456 C for the active channel 9 4 22 UNIT TEMPerature units Page 97 Command Returns Parameters Function Example UNIT TEMP units UNIT TEMPERATURE units None units C or CEL Degrees Celcius F or FAR Degrees Fahrenheit K Kelvin R Resistance ohm s W Ratio Sets the active channel s units UNIT TEMP lt space gt CEL lt cr gt sets the active channel s units to celcius ASL 2009 F600AC 14 001 2 9 F600AC User Man
95. tance to temperature conversion Press the 2 key on the numeric pad or use the up and down keys to navigate to the Probe Menu and press the OK key to access this menu 2 Probes 1 Review 2 Edit A OK v Menu Back LI LJ Press the 1 key or the OK key to Review the previously entered probe data Probe identification is shown on the top line followed by the type 4 wire 8 and the resistance to temperature conversion method DIN The coefficients for the conversion method are shown below the probe type PbNo Name Wire Conv 94 94 Probe details 00 def00 4 W DIN 100 01 ok ke ke ke e empty kkk kkk k k 02 kkkkkkkk empty kkkkkkkk 03 kkkkkkkk empty kkkkkkkk 04 kkkkkk kk empty kkk ke ke e k 05 ok ke e e empty kkk kkk kk kkk kk kkkkkkkk empty kkk kkk kk Menu Back L LI LJ 18 3 wire measurement is only available when using an external multiplexer unit Page 51 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Use the Next Page and Last Page soft keys to move between pages to review information about all the probes Last Page will appear once the Next Page key is pressed Press the Menu key to return to measurement mode or the Back key to return to the previous menu Page 52 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 5 3 4 Probe Edit menu All probes used on the F600 must have the correct data entered to accurately perform the resistance to temperature conversion
96. te mode the instrument must be sent a Remote mode command see section 9 4 1 It is not necessary to be in remote mode to use any of the PC commands but care must be taken not to inadvertently change settings 26 A number of these are available free on the Web Page 86 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 9 3 2 Programming command syntax The programming command language is based on the SCPI command format Commands consist of one or more command strings containing some or all of the following Colon Separates command words Question mark Command requiring a response Space Separates the command word from the first parameter shown as lt space gt in the examples Comma Separates the parameters list Parameter parameter list Parameters list separated by commas Terminator cr Terminates the line and the command For example the current may be set by sending the string CONF CURR 2 3 cr i e command command space gt lt parameter gt lt gt lt parameter gt lt terminator s gt It is important to remember the space between the end of CURR and the 2 9 3 3 Case sensitivity Command words are not case sensitive you can use upper or lower case characters or any combination For example the following are all valid SYSTEM REMOTE system remote or even SyStEm rEmOTE 9 3 4 Long form short form commands Command words can have a long form and short fo
97. to the R and Rs terminals should be kept clean to prevent leakage currents flowing Damaged cable and connectors are a common cause of poor and intermittent operation Page 118 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual This page is intentionally left blank Page 119 ASL 2009 F600AC 14 001 2 9 F600AC User Manual 13 Service and Warranty ASL F600 instruments and accessories unless stated otherwise are covered by a 12 month warranty on parts and labour from the date of dispatch from ASL provided the instrument has not been damaged in use or tampered with This warranty does not include costs incurred in returning the equipment to the factory for repair 13 1 Technical Support For all technical support repair warranty and service inquiries please contact Page 120 Technical Services ASL 2 Gatton Business Park Wells Place Redhill Surrey RH1 3LG ENGLAND United Kingdom Telephone 44 0 1737 649300 Fax 44 0 1737 649301 E Mail service aslltd co uk Web Page www aslltd co uk ASL 2008 F600AC 14 001 2 8 ASL F600AC User Manual 14 Appendix 1 Firmware update 14 1 Firmware updates ASL may decide to provide firmware updates from time to time These can be downloaded from the ASL website www aslltd co uk The procedure for updating the F600 is described in detail below A PC downloader software and USB cable are required 14 2 Firmware update disclaimer
98. ts x Do NOT insert objects into openings x Do NOT place the instrument onto a hot or cold surface x DoNOT place any weight on top of the instrument X Do use the correct USB lead supplied Warning The outer conductor of the BNC connectors and the cable braid are not at earth potential and should not be earthed Page viii ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual Warning Do NOT open the case There are no user serviceable parts inside Warning Inspect cables and probes regularly ensuring that their insulation is not damaged Warning The instrument and the internal Li clock battery must be disposed of in accordance with local regulations General warning symbol This indicates that a hazardous condition or general danger may exist You must read the relevant sections in the User Manual before using the instrument Refer to manual symbol When you see this symbol on the instrument it means that there is more information relating to this in the User Manual Page ix ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Important installation information Please ensure that the instrument is installed correctly x Do NOT use the instrument near water or in damp conditions x Do NOT locate the instrument near a source of heat x Do NOT insert objects into any ventilation openings x Do NOT site the instrument in a draught or near an air conditioning unit x Do NOT site the instrument
99. ual ASL 9 4 23 UNIT TEMPerature Command Returns Function Example UNIT TEMP UNIT TEMPERATURE lt units gt lt cr gt Returns the active channel measurement units Change current display unit UNIT TEMP lt cr gt command C lt cr gt lt lf gt response returns the active channel s units as celcius 9 4 24 MEAS READALL or READALL Command Returns Function Example Errors 9 4 25 PB ID nn Command Returns Function Example Errors Page 98 MEAS READALL Meas W W Meas R R Meas C C Meas FP lt F gt lt Meas K lt K gt lt cr gt Returns the next valid measurement for the active channel with all the conversion results MEAS READALL lt cr gt command 1 000079 W 100 0136 R 0 035 C 32 063 F 273 185K lt cr gt lt lf gt response EO0 Unrecognised command E01 Command is not parts of MEAS series PB ID nn None Selects local probe for editing PB ID O5 cr command EO0 Unrecognised command E01 Command is not part of the PB series EO2 Missing parameter i e nn E03 nn exceeds allowable probe limit ASL 2009 F600AC 14 001 2 9 Notes 9 4 26 PB ID Command Returns Function Example Errors Notes F600AC User Manual Probe ID O0 is not edittable There is a limit of 100 probes that the system can hold PB ID nn cr Returns the currently selected edittable probe number PB
100. ultaneously in the F600 Bridge Note It is good practice to switch off the bridge before changing resistors This will prevent the resistors from experiencing any larger than normal currents Page 12 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 3 6 Rear panel The rear panel is shown below with the various items and connectors indicated Mains input switch and fuse USB or IEEE Expansion port 1 Analogue outputs connector USB shown x Expansion Port Serial Intertace Analogue 1 f O P 10vdc Analogue 2 Expansion Port OP 1 vdc Parallel Interface LE Bandwidth 1 Hz Power in 50 264VAC 47 63Hz IVA max FUSE TZA 250VAC Earth connector Electrical rating Expansion port 2 Serial number Figure 3 4 rear panel 3 6 1 Name plate and serial number The instrument s serial number is positioned here 3 6 2 Electrical rating plate The instrument rating information on the rear panel shows the instrument s input supply requirements fuse value and maximum power consumption 3 6 3 Mains input The mains input connector is situated on the left of the rear panel It uses a standard IEC connector and lead supplied The input connector has a switch and is fused The fuse s are located within the body of the connector Page 13 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL 3 6 4 Expansion ports There are two expansion port connectors provided on the rear panel These c
101. umeric pad and use the up and down keys to navigate to the System Menu and press the OK key to access this menu Use the navigation key to move to the Calibration menu as shown below 4 System 1 Information 2 Display 3 Clock 4 Calibration 5 Analogue 1 OK 6 Presets v Menu Back Press the 4 key or the OK key to see the menu 44 Calibration 1 Internal Resistors 2 Set Factory Defaults OK Menu Back LI L Press the 1 key or the OK key to see the calibration menu for the internal resistors data entry for the instrument serial number is also shown on this screen Page 66 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 441 Internal Resi stors Batch No 000000 Serial No 000 Rs 00 25 p Rs 01 100 001 luas Actual value Menu Back LJ EJ C1 Use the W key to move to the required resistor value Press the Edit soft key to adjust the internal calibration resistance values The screen will change to show Current edit field Use the Work out the adjusted resistance value that must be entered based on the actual insert II Delete II Space II Exit Menu Back calibration resistor value This is most easily done by first setting the internal calibration value Rint to the nominal resistor value Rnom measuring the value Robs and then entering the calibration resistance value calculated from R Re R Internal R Nom Obs 21 Note that these will be re
102. y store up to 99 sets of calibration data in the instrument It is very important therefore that a sensor is used on a properly configured input channel and that the probes coefficients are correctly entered into the instrument Note Always check that the coefficients are correctly set for the probe being used Failure to do so will almost certainly lead to incorrect measurements System accuracy is a combination of the Bridge s accuracy in measuring the probe resistance to reference resistance ratio and the calibration uncertainty placed on reference resistors and PRTs by the calibrating laboratory 1 4 Balance readings The F600 only displays balanced readings unlike some previous AC bridges e g F300 that output values all the time This means that when the temperature that changes quickly the bridge will not output a value until it is balanced Page 3 ASL 2009 F600AC 14 001 2 9 F600AC User Manual ASL Page 4 ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 2 Setting up the F600 2 1 Safety information Please read the safety information section before attempting to operate the F600 2 2 Unpacking the instrument When you unpack the F600AC Bridge check that the following items are present before using the instrument F600AC precision thermometry bridge e Operator s handbook on CD Test certificate D Mains lead e USB lead Please contact the ASL Technical Services Group
103. your dealer supplier or the local authorities and ask for the correct method of disposal Battery The F600 contains a small lithium button cell that can be removed from the main control PCB This battery must be disposed of in accordance with local regulations Page xii ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual This page is intentionally left blank Page xiii O ASL 2009 F600AC 14 001 2 9 ASL F600AC User Manual 1 Introduction 1 1 Overview The F600AC Precision Thermometry Bridge is a high precision instrument designed for laboratory commercial and industrial temperature measurement and calibration applications The F600AC Bridge operates with all 4 wire Platinum Resistance Thermometers PRTs Features include e Immunity to most sources of errors present in DC Bridges e Internal or external reference resistors e Alarge graphic VFD display for excellent viewing of measurement values and instrument settings e USB communication interface as standard for automated monitoring and calibration applications e Calibration against traceable external standards e User selectable units ratio resistance or temperature display Q C F or K e Wide operational range to include all 4 wire thermometers with Ro values from 0 25 ohms to 4 999 ohms e Rack mount option shown on front cover e Expandable to allow multi channel input multiplexing e Upto 99 probe calibration configurations e Up to

F600 Precision AC Thermometry Bridge

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